1
                                                                   EXHIBIT 10.25



     [EXECUTION COPY DATED DECEMBER 30, 1998 PREPARED BY FREDERIC DORWART]







                            C O N F I D E N T I A L






                              ACQUISITION DOCUMENT
        (POOLING OF INTERESTS AND TRIPARTITE FORWARD MERGER TRANSACTION)




                                      ****






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                                MERGER AGREEMENT

                                     AMONG

                           BOK FINANCIAL CORPORATION,


                     BOKF MERGER CORPORATION NUMBER SEVEN,


                      FIRST BANCSHARES OF MUSKOGEE, INC.,

               FIRST NATIONAL BANK AND TRUST COMPANY OF MUSKOGEE,

                                      AND

                              CERTAIN SHAREHOLDERS
                                       OF
                      FIRST BANCSHARES OF MUSKOGEE, INC.,



                                    * * * *








                      AGREEMENT DATE OF DECEMBER 30, 1998







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                                     INDEX
                                       TO
                                MERGER AGREEMENT



                 SECTION                                                                                      PAGE
                 -------                                                                                      ----
                                                                                                        
1.    Purpose of this Merger Agreement.........................................................................1
2.    The Merger...............................................................................................2
3.    Effect of the Merger.....................................................................................3
4.    Representations and Warranties of Principal Shareholders ................................................4
5.    Representations and Warranties of BOKF..................................................................13
6.    Covenants...............................................................................................17
7.    Conditions Precedent to Closing by BOKF and Mergercorp..................................................28
8.    Conditions Precedent to Closing by First Muskogee.......................................................30
9.    Closing.................................................................................................31
10.   Provisions Respecting BOKF Shares.......................................................................34
11.   First Muskogee Termination Damages......................................................................35
12.   BOKF Termination Damages................................................................................37
13.   The BOKF Common Stock Escrow............................................................................37
14.   Miscellaneous Provisions................................................................................53

                 EXHIBIT CAPTION                                                        EXHIBIT NUMBER
                 ---------------                                                        --------------
      Principal Shareholders                                                                  1.3
      Stock Options                                                                           2.9
      Subsidiaries                                                                            4.3
      Material Liabilities                                                                  4.6.3
      Conduct of Business Prior to Closing Exceptions                                         4.7
      Contracts and Commitments                                                               4.9
      Litigation                                                                             4.10
      Employee Contracts and Benefit Plans                                                   4.15
      Employment Agreement                                                                 6.12.1
      Obligations                                                                            6.13
      Compensation Exceptions                                                               6.3.7
      First Muskogee Counsel's Opinion                                                        7.4
      Non-Competition Agreement                                                               7.7
      BOKF Counsel's Opinion                                                                  8.3
      Exceptions to Agreement Terminations                                                  9.1.3



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                                MERGER AGREEMENT

        This merger agreement ("Merger Agreement") is effective as of December
30, 1998 (the "Agreement Date") among:

                  (i)      First Bancshares of Muskogee, Inc., an Oklahoma
                           Corporation ("First Muskogee");

                  (ii)     First National Bank and Trust Company of Muskogee
                           ("First Muskogee Bank");

                  (iii)    The shareholders of First Muskogee set forth in
                           Exhibit 1.3 ("Principal Shareholders");

                  (iv)     BOK Financial Corporation ("BOKF"); and,

                  (v)      BOKF Merger Corporation Number Seven
                           ("Mergercorp").

        In consideration of the mutual covenants contained herein, the adequacy
of which is hereby expressly acknowledged, and intending to be legally bound
hereby, First Muskogee, First Muskogee Bank, Principal Shareholders, BOKF and
Mergercorp agree as follows:

1.      PURPOSE OF THIS MERGER AGREEMENT. The purpose of this Merger Agreement
        is as follows:

        1.1       First Muskogee is a bank holding company organized under the
                  laws of Oklahoma with offices in Muskogee, Oklahoma. First
                  Muskogee is subject to regulation by the Federal Reserve
                  Board ("FRB"). First Muskogee owns all of the issued and
                  outstanding capital stock of First Muskogee Bank (located in
                  Muskogee, Oklahoma). First Muskogee Bank is a bank organized
                  in accordance with the laws of the United States and subject
                  to regulation by the Office of the Comptroller of the
                  Currency. The issued and outstanding capital stock of First
                  Muskogee consists solely of a single class of common stock of
                  a par value of $10.00 per share ("Common Stock") of which
                  81,260 shares are issued and outstanding. The issued and
                  outstanding Common


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                  Stock of First Muskogee as of the Closing is hereafter called
                  the "First Muskogee Common Stock". 

        1.2       BOKF is a bank holding company organized under the laws of
                  the State of Oklahoma. BOKF is subject to regulation by the
                  FRB. BOKF owns all of the capital stock of Mergercorp.
                  Mergercorp has not heretofore engaged in business, but has
                  been formed to effect the transaction contemplated in this
                  Merger Agreement. The issued and outstanding capital stock of
                  Mergercorp consists solely of 1,000 shares of common stock,
                  par value of $1.00 per share (the "Mergercorp Shares").

        1.3       The Principal Shareholders set forth on Exhibit 1.3 own not
                  less than fifty and one tenth percent (50.1%) of the First
                  Muskogee Common Stock.

        1.4       The purpose of this Merger Agreement is to set forth the
                  terms and conditions on which First Muskogee and Mergercorp
                  shall merge. This Merger Agreement shall constitute a plan of
                  merger for corporate law purposes and for federal income tax
                  purposes under Section 368(a)(2)(D) of the Internal Revenue
                  Code.

        1.5       BOKF owns all of the issued and outstanding capital stock of
                  Bank of Oklahoma, National Association ("BOk").

        1.6       As used in this Merger Agreement, the term "Holders" includes
                  the Principal Shareholders and all other holders of First
                  Muskogee Common Stock, including all holders of Stock Options
                  (as hereafter defined) which are exercised prior to the
                  Closing or converted at the Closing.

2.      THE MERGER. On the terms and conditions hereafter stated, First
        Muskogee shall be merged into Mergercorp (the "Merger").





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        2.1       Mergercorp shall be the surviving corporation ("Surviving
                  Corporation").

        2.2       The Certificate of Incorporation of Mergercorp shall be the
                  Certificate of Incorporation of the Surviving Corporation
                  until changed as provided by law.

        2.3       The Bylaws of Mergercorp shall be the Bylaws of the Surviving
                  Corporation until changed as provided by law.

        2.4       The officers of Mergercorp shall be the officers of the
                  Surviving Corporation, until changed as provided by law.

        2.5       The directors of Mergercorp shall be the directors of the
                  Surviving Corporation until changed as provided by law.

        2.6       The Merger shall be effective at the Closing (as hereafter
                  provided in Section 9).

        2.7       Each share of First Muskogee Common Stock shall, subject to
                  the provisions of Section 1091 of the Oklahoma General
                  Corporation Act, automatically and without any action on the
                  part of the holder thereof, be converted into: 

                  2.7.1    14.3089 shares (Conversion Ratio") of fully paid and
                           non- assessable shares of Common Stock, par value of
                           $0.0006 per share, of BOKF ("BOKF Common Stock");
                           provided, however, no fractional shares shall be
                           issued and, in lieu of any fractional share to which
                           any person or entity who or which is a record holder
                           of First Muskogee Common Stock is entitled, a full
                           share of BOKF Common Stock shall be issued; and,





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                  2.7.2    Each Holder shall have the right to receive, upon
                           termination of the BOKF Common Stock Escrow (as
                           hereafter defined in Section 13), his or her share
                           of the Escrow Shares (as hereafter defined)
                           distributable to Holders upon termination of the
                           BOKF Common Stock Escrow.

        2.8       The shares of BOKF Common Stock issued in accordance with
                  Section 2.7 and Section 2.9 are hereafter collectively called
                  the "BOKF Shares".

        2.9       Each stock option to buy one share of First Muskogee Common
                  Stock described in Exhibit 2.9 which remains outstanding at
                  the Closing (collectively, the "Stock Options") shall
                  automatically and without any action on the part of the
                  holders of the Stock Options be converted (without the
                  payment of the Option Price) into 10.6596 shares of BOKF
                  Common Stock; provided, however, no fractional shares shall
                  be issued and, in lieu of any fractional share to which any
                  person who is a record holder of Stock Options is entitled, a
                  full share of BOKF Common Stock shall be issued.
                  Notwithstanding the foregoing, if permitted by the accounting
                  rules pertaining to accounting for the Merger as a pooling of
                  interest under A.P.B. 16 (as determined by the opinion
                  described in Section 7.5), each Stock Option to buy one share
                  of First Muskogee Common Stock which remains outstanding at
                  the Closing shall automatically and without any action on the
                  part of the holders of the Stock Options be converted 
                  (without the payment of the Option Price) into 6.8221 shares
                  of BOKF Common Stock and BOKF shall, in respect of each such
                  Stock Option, withhold and pay over in lieu of any other 
                  withholding $181.32 to the Internal Revenue Service for the 
                  account of the holder of such Stock Option; provided, 
                  however, no fractional 



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                  shares shall be issued and, in lieu of any fractional share 
                  to which any person who is a record holder of Stock Options
                  is entitled, a full share of BOKF Common Stock shall be
                  issued. If any of the Stock Options terminate without being
                  exercised, the Conversion ratio and the conversion factor for
                  the Stock Options shall be recalculated by mutual agreement
                  of BOKF and First Muskogee to accomplish the intention of the
                  parties.

        2.10      A portion of the BOKF Common Stock issuable to Holders of
                  First Muskogee Common Stock and Stock Options will be
                  delivered to the BOKF Common Stock Escrow (as defined in
                  Section 13) (the "Escrow Shares"). The Escrow Shares shall
                  consist of a total number of shares of BOKF Common Stock
                  having a market value on the Closing date of $1 million
                  (determined in the manner provided in Section 13.6), adjusted
                  for any rounding requirements. The number of shares of BOKF
                  Common Stock deliverable into escrow shall be prorated
                  between the holders of First Muskogee Common Stock
                  outstanding on the Closing Date (excluding any dissenting
                  shares) (based on the number of shares of First Muskogee
                  Common Stock owned by each Holder) and the holders of Stock
                  Options at the Closing date (based on the number of shares of
                  First muskogee Common Stock the optionee would have received
                  had the option been exercised in full prior to the closing),
                  rounded in the case of each Holder up to the nearest whole
                  share.

3.      EFFECT OF THE MERGER. The Merger shall have the following effects:

        3.1       The corporate franchise, existence, rights and liabilities of
                  Mergercorp shall continue unaffected and unimpaired.





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        3.2       The corporate franchise, existence, rights and liabilities of
                  First Muskogee shall be merged into Mergercorp and the
                  separate existence of First Muskogee shall cease.

        3.3       Mergercorp shall have and be vested with all of the rights,
                  powers, assets, property, liabilities and obligations of
                  First Muskogee.

4.      REPRESENTATIONS AND WARRANTIES OF FIRST MUSKOGEE AND FIRST MUSKOGEE
        BANK. First Muskogee and First Muskogee Bank hereby, jointly and
        severally, represent and warrant to BOKF that:

        4.1       INCORPORATION AND CORPORATE POWER. First Muskogee is a
                  corporation duly organized, validly existing and in good
                  standing under the laws of Oklahoma. First Muskogee Bank is a
                  bank duly organized, validly existing and in good standing
                  under the laws of the United States. Each of First Muskogee
                  and First Muskogee Bank has all the corporate power and
                  authority necessary and required to own its properties and to
                  conduct its business as such business is now being conducted.
                  Each of First Muskogee and First Muskogee Bank is (A) in
                  material compliance with all applicable provisions of all
                  applicable federal, state and local statutes, laws,
                  regulations, ordinances and other requirements of any
                  governmental authorities (including, but not limited to,
                  whether similar or dissimilar, the Bank Holding Company Act
                  of 1956, the Oklahoma General Corporation Act, the National
                  Bank Act and the filing of all administrative reports and the
                  payment of all fees) in effect as of the date of this Merger
                  Agreement and (B) shall be in material compliance therewith
                  at the time of Closing.



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4.2     CAPITAL.

                  4.2.1    The Principal Shareholders are the record and
                           beneficial owners of (i) not less than fifty and one
                           tenth percent (50.1%) of the First Muskogee Common
                           Stock. The First Muskogee Common Stock is and at the
                           Closing will be all of the issued and outstanding
                           capital stock of First Muskogee. No person or entity
                           has any right or option to acquire any capital stock
                           of First Muskogee except Stock Options. The First
                           Muskogee Common Stock shall consist at the Closing
                           of no more than eighty-one thousand two hundred and
                           forty (81,240) shares plus the number of such shares
                           as may be issued upon the exercise of Stock Options.

                  4.2.2    First Muskogee owns all of the issued and
                           outstanding capital stock of First Muskogee Bank
                           (the "First Muskogee Bank Stock"). The First
                           Muskogee Bank Stock is and at the Closing will be
                           all of the issued and outstanding capital stock of
                           First Muskogee Bank. No person or entity has any
                           right or option to acquire any capital stock of
                           First Muskogee Bank.

        4.3       CAPITALIZATION OF FIRST MUSKOGEE AND FIRST MUSKOGEE BANK. The
                  First Muskogee Common Stock and First Muskogee Bank Stock are
                  validly issued and outstanding, fully paid and
                  non-assessable. There are no outstanding subscriptions,
                  conversion privileges, calls, warrants, options or agreements


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                  obligating First Muskogee and First Muskogee Bank to issue,
                  sell or dispose of, or to purchase, redeem or otherwise
                  acquire any shares of their capital stock (collectively,
                  "options and rights") except the Stock Options and agreements
                  relating to directors qualifying shares of First Muskogee
                  Bank. None of the First Muskogee Common Stock and First
                  Muskogee Bank Stock has been issued or disposed of in
                  violation of any preemptive rights of any shareholder nor in
                  violation of any agreement to which First Muskogee or First
                  Muskogee Bank was or is a party. First Muskogee and First
                  Muskogee Bank have no subsidiaries and do not own, nor have
                  the right or obligation to acquire, any shares of equity
                  securities of any corporation except (i) First Muskogee Bank
                  is a subsidiary of First Muskogee and (ii) as set forth in
                  Exhibit 4.3. 

        4.4       NON-VIOLATION OF OTHER AGREEMENTS. The execution and delivery
                  of this Merger Agreement, and the compliance with its terms
                  and provisions by First Muskogee and First Muskogee Bank
                  (including the execution and delivery of any document
                  required to be executed by First Muskogee or First Muskogee
                  Bank) will not breach any agreement, lease, or obligation of
                  any nature, whether similar or dissimilar, by which First
                  Muskogee or First Muskogee Bank is bound.

        4.5       FINANCIAL STATEMENTS. First Muskogee has delivered to BOKF,
                  or will have delivered to BOKF prior to the Closing as soon
                  as future financial statements are available, copies of the
                  following ("Financial Statements"):

                  4.5.1    Consolidated Financial Statements (Unaudited) for
                           First Muskogee and Subsidiaries, December 31, 1996
                           and 1997;


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                  4.5.2    Financial Statements (Unaudited) for First Muskogee
                           Bank, December 31, 1996 and 1997;

                  4.5.3    Financial Statements (Unaudited) for First Muskogee
                           and Subsidiaries, September 30, 1998, December 31,
                           1998, March 31, 1999 (if the Closing occurs after
                           March 31, 1999), and after March 31,1999 such
                           financial statements as are available; and,

                  4.5.4    Financial Statements (Unaudited) for First Muskogee
                           Bank, September 30, 1998, December 31, 1998, March
                           31, 1999 (if the Closing occurs after March 31,
                           1999) and after March 31,1999 such financial
                           statements as are available.

                  The Financial Statements described in Section 4.5.1 and 4.5.2
                  (A) have been prepared or will have been prepared in
                  accordance with generally accepted regulatory accounting
                  principles, consistently applied and (B) fairly reflect the
                  financial condition and results of operations for the
                  indicated periods. The Financial Statements described in
                  Sections 4.5.3 and 4.5.4 fairly reflect the financial
                  condition and results of operations for the periods
                  indicated, subject to immaterial year-end adjustments and the
                  omission of footnotes.

        4.6       MATERIAL LIABILITIES. Neither First Muskogee nor First
                  Muskogee Bank has any material liabilities (including, but
                  not limited to, whether similar or dissimilar, liabilities or
                  obligations for taxes, whether due or to become due) except:

                  4.6.1    Those fully reflected or reserved against, or
                           otherwise disclosed, in the Financial Statements;


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                  4.6.2    Those incurred with due care since September 30,
                           1998 in the normal course of business consistent
                           with past practices; and,

                  4.6.3    Those specifically disclosed in Exhibit 4.6.3 to
                           this Merger Agreement.

        4.7       CONDUCT OF BUSINESS PRIOR TO CLOSING. Except as set forth in
                  Exhibit 4.7, since September 30, 1998, and until the Closing
                  of this transaction, (A) each of First Muskogee and First
                  Muskogee Bank has carried on and will carry on its business
                  only in the ordinary and normal course consistent with past
                  practices and (B) has not and will not, without the prior
                  consent of BOKF:

                  4.7.1    Incur any material liabilities, commitments or
                           obligations, contingent or otherwise, or dispose of
                           any of its assets, except in the ordinary course of
                           its business consistent with past practices and for
                           the purpose of carrying on the business as a going
                           concern;

                  4.7.2    Incur any bank or other institutional debt, or enter
                           into any agreement for the borrowing of money;
                           except borrowing of federal funds or borrowing from
                           the Federal Home Loan Bank by First Muskogee Bank
                           consistent with past practices;

                  4.7.3    Suffer any material adverse change in the financial
                           conditions, assets, liabilities, business or
                           property of First Muskogee taken as a whole or of
                           First Muskogee Bank taken as a whole; and,


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                  4.7.4    Make any material change in the manner in which
                           business is conducted (including, without
                           limitation, branch relations, branch closings, and
                           any material change in products offered to
                           customers).

        4.8       TAX RETURNS/REPORTS. Each of First Muskogee and First
                  Muskogee Bank has duly filed all tax reports and returns
                  required to be filed by it and has duly paid all taxes and
                  other charges claimed to be due from it by federal, state and
                  local taxing authorities. No waivers of the statute of
                  limitation have been issued with respect to unaudited years.
                  First Muskogee and First Muskogee Bank have no knowledge of
                  any facts which could reasonably be expected to result in a
                  material deficiency with respect to unaudited tax returns
                  which would result in a material adverse effect on First
                  Muskogee taken as a whole or First Muskogee Bank taken as a
                  whole.

        4.9       CONTRACTS AND COMMITMENTS.

                  4.9.1    A list of all contracts and commitments, other than
                           credit and lending, deposit or borrowing
                           transactions entered into in the ordinary course of
                           business by First Muskogee or First Muskogee Bank
                           which are material to the business, operations or
                           financial condition of First Muskogee or First
                           Muskogee Bank as of this date, is set forth on
                           Exhibit 4.9. For the purpose of Exhibit 4.9,
                           materiality shall mean those contracts and
                           commitments (including a series of related contracts
                           or commitments) for which payment or other
                           consideration to be furnished by any party is more
                           than $25,000.


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                  4.9.2    Except as set forth on Exhibit 4.9, each of First
                           Muskogee and First Muskogee Bank has in all material
                           respects performed and is performing all contractual
                           and other obligations required to be performed by
                           them.

        4.10      LITIGATION. Except as set forth in Exhibit 4.10, there is not
                  pending, or, to the knowledge and belief of First Muskogee
                  and First Muskogee Bank threatened, any claim, litigation,
                  proceeding, order of any court or governmental agency, or
                  governmental investigation or inquiry to which First Muskogee
                  or First Muskogee Bank is a party or which involves their
                  business operations, any of their property or any property
                  leased by them which, individually or in the aggregate:

                  4.10.1   May reasonably result in any material adverse change
                           in the financial condition, business, prospects,
                           assets, properties or operations of First Muskogee
                           taken as a whole or First Muskogee Bank taken as a
                           whole;

                  4.10.2   May reasonably involve the expenditure of more than
                           a total of $10,000 in legal fees and/or allocated
                           employees' salaries or their direct or indirect
                           costs; or,

                  4.10.3   Alleges violation of any law, rule or regulation.

        4.11      BROKERAGE FEES. Neither First Muskogee nor First Muskogee
                  Bank has incurred or will incur, directly or indirectly, any
                  liability for brokerage, finder's, financial advisor's or
                  agent's fees or commissions by virtue of any commitment made
                  by any of them in connection with this Merger Agreement or
                  any transaction contemplated hereby except for the fee to
                  Alex Sheshunoff & Co. ("Sheshunoff") pursuant to that certain
                  agreement dated August 31, 1998.



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        4.12      REQUIRED CORPORATE ACTION. The execution, delivery and
                  consummation of this Merger Agreement has been duly and
                  validly authorized by the board of directors of First Muskogee
                  and will at the time of Closing have been duly and validly
                  authorized by the board of directors of First Muskogee Bank
                  and the shareholders of First Muskogee and First Muskogee
                  Bank.

        4.13      AUTHORIZED EXECUTION. This Merger Agreement has been duly
                  executed and delivered by Principal Shareholders and by duly
                  authorized officers of First Muskogee and First Muskogee
                  Bank. This Merger Agreement constitutes the legal, valid and
                  binding agreement and obligation of Principal Shareholders,
                  First Muskogee and First Muskogee Bank enforceable against
                  them in accordance with its terms, except as may be limited
                  by applicable bankruptcy, insolvency, moratorium,
                  receivership, and other similar laws affecting the rights of
                  creditors generally.

        4.14      TITLE TO ASSETS; ENCUMBRANCES. First Muskogee and First
                  Muskogee Bank have good and valid title (with respect to fee
                  real estate, good and valid title shall mean such title as
                  may be insured on standard title insurance forms with no
                  exceptions materially and adversely affecting the value or
                  use of the fee real estate) to their assets, and in each case
                  subject to no mortgage, pledge, lien, security interest,
                  conditional sale agreement, or other encumbrance of any
                  nature whether similar or dissimilar, except: 

                  4.14.1   Such encumbrances which are purchase money security
                           interests entered into in the ordinary course of
                           business consistent with past practice reflected on
                           their books and records;



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                  4.14.2   Lessors' interests in leased tangible real and
                           personal property reflected on their books and
                           records;

                  4.14.3   Such encumbrances for taxes and assessments not yet
                           due and payable;

                  4.14.4   Encumbrances as do not materially detract from the
                           value or interfere with the use or operation of the
                           asset subject thereto; and,

                  4.14.5   Repossessed and foreclosed assets acquired in
                           satisfaction of debt previously contracted.

        4.15      EMPLOYEES. Except as set forth on Exhibit 4.15, none of the
                  employees of First Muskogee and First Muskogee Bank is
                  employed under any employment contract (oral or written) or
                  is the beneficiary of any compensation plan (oral or written)
                  or is entitled to any payment from First Muskogee and First
                  Muskogee Bank by reason of this Merger Agreement or the
                  Merger and there are no employment contracts, management
                  contracts, consulting agreements, union contracts, labor
                  agreements, pension plans, profit sharing plans or employee
                  benefit plans to which First Muskogee or First Muskogee Bank
                  are a party or by which either of them is bound. The First
                  Muskogee 401k Plan is in full compliance with all
                  requirements of the Plan and with the Employee Retirement
                  Income Security Act and the regulations promulgated pursuant
                  thereto.


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        4.16      ENVIRONMENTAL LAWS. The existence, use and operation of the
                  assets of First Muskogee and First Muskogee Bank are in
                  material compliance with all applicable statutes, rules and
                  regulations including, without limiting the generality of the
                  foregoing, all environmental and zoning laws and the
                  Americans With Disabilities Act.

        4.17      SURVIVAL AND INDEPENDENCE OF REPRESENTATIONS AND WARRANTIES.
                  The representations and warranties of First Muskogee and
                  First Muskogee Bank made in this Merger Agreement shall
                  survive the Closing hereof notwithstanding any investigation
                  or knowledge of BOKF; provided BOKF or Mergercorp shall give
                  notice to Agent (as hereafter defined) of any claim of a
                  breach of any such representations and warranties on or
                  before the earlier of one year following the Closing or the
                  first audit of financial statements containing the combined
                  operations of BOKF and First Muskogee by BOKF's independent
                  auditors, at which any such breach would reasonably be
                  expected to be encountered in the audit process (the "Claim
                  Notice Deadline"). Each of the representations and warranties
                  of First Muskogee and First Muskogee Bank set forth in this
                  Merger Agreement is a separate and independent representation
                  and warranty, shall be cumulative of and in addition to all
                  other warranties and representations, and shall not limit or
                  be interpreted to be in derogation of any other
                  representation or warranty made herein.

        4.18      FIRST MUSKOGEE AND FIRST MUSKOGEE BANK INDEMNIFICATION. First
                  Muskogee and First Muskogee Bank shall defend and indemnify
                  BOKF against, and hold BOKF harmless from, all loss, cost and
                  expense (including interest at the judgment rate and
                  attorney's fees) arising out of any material 


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                  breach of any representation or warranty made by First
                  Muskogee and First Muskogee Bank in this Merger Agreement;
                  provided, BOKF shall, on or before the Claim Notice Deadline,
                  give notice of any breach of such representations and
                  warranties to Agent (as hereafter defined); and, provided
                  further, the sole remedy for a breach of such representations
                  and warranties following the Closing shall be a claim against
                  the Escrow Shares.

5.      REPRESENTATIONS AND WARRANTIES OF BOKF. BOKF and Mergercorp represent
        and warrant, jointly and severally, to First Muskogee and Holders that:

        5.1       INCORPORATION AND CORPORATE POWER. BOKF and Mergercorp are
                  corporations duly organized, validly existing and in good
                  standing under the laws of Oklahoma. BOKF and Mergercorp have
                  all the corporate power and authority necessary and required
                  to consummate the transactions contemplated by this Merger
                  Agreement.

        5.2       NON-VIOLATION OF OTHER AGREEMENTS. The execution and delivery
                  of this Merger Agreement, and compliance with its terms and
                  provisions by BOKF and Mergercorp and the execution of any
                  document required to be executed by BOKF or Mergercorp, will
                  not: 


                  5.2.1    Violate, conflict with or result in the breach of
                           their respective certificates of incorporation or
                           bylaws or any of the terms, conditions or provisions
                           of any agreement or instrument to which BOKF or
                           Mergercorp is a party, or by which BOKF or
                           Mergercorp is bound;

                  5.2.2    Result in the creation or imposition of any lien,
                           charge, encumbrance or restriction of any nature
                           whatever upon any 


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                           of the property, contracts or business of BOKF and
                           Mergercorp; or,

                  5.2.3    Require the consent of any party to a contract with
                           BOKF and Mergercorp in order to keep the contract
                           enforceable.

        5.3       ISSUANCE OF BOKF SHARES. The issuance and delivery of the
                  BOKF Shares have been duly authorized and the BOKF Shares
                  have been duly reserved for issuance by all necessary
                  corporate actions on the part of BOKF. The BOKF Shares, when
                  issued and delivered in accordance with this Merger
                  Agreement, shall be duly authorized, validly issued and
                  outstanding, fully paid and non-assessable, and free and
                  clear of any liens or encumbrances.

        5.4       REQUIRED CORPORATE ACTION. The execution, delivery and
                  consummation of this Merger Agreement by BOKF and Mergercorp
                  have been duly and validly authorized by the boards of
                  directors of BOKF and Mergercorp and the approval of the
                  shareholders of Mergercorp. The approval of the shareholders
                  of BOKF is not required. This Merger Agreement has been duly
                  executed and delivered by duly authorized officers of BOKF
                  and Mergercorp. This Merger Agreement constitutes a legal,
                  valid and binding agreement and obligation of BOKF and
                  Mergercorp enforceable against BOKF and Mergercorp in
                  accordance with its terms, except as may be limited by
                  applicable bankruptcy, insolvency, moratorium, receivership,
                  and other similar laws affecting the rights of creditors
                  generally.

        5.5       CAPITALIZATION. As of September 30, 1998, the authorized
                  capital stock of BOKF consisted of (i) 2.5 billion shares of
                  Common Stock, 22,505,709 shares of which are currently issued
                  and outstanding and (ii) one billion 



   21


                  shares of Preferred Stock, of which 2.5 million shares of
                  Series A Preferred Stock are currently issued and outstanding
                  which are currently convertible into 2,985,132 shares of BOKF
                  Common Stock. All outstanding shares of BOKF Common Stock and
                  Preferred Stock have been duly authorized and validly issued,
                  and are fully paid and nonassessable.
     
        5.6       LITIGATION. There is no action, suit, proceeding or
                  investigation pending, or, to the knowledge of BOKF or
                  Mergercorp, threatened, against BOKF or Mergercorp which
                  questions the validity of this Merger Agreement or the right
                  of BOKF or Mergercorp to enter into this Merger Agreement or
                  to consummate the transactions contemplated hereby.

        5.7       BROKERAGE FEES. Neither BOKF nor Mergercorp has incurred or
                  will incur, directly or indirectly, any liability for
                  brokerage, finder's, financial advisor's or agent's fees or
                  commissions by virtue of any commitment made by BOKF or
                  Mergercorp in connection with this Merger Agreement or any
                  transaction contemplated hereby. Neither BOKF nor Mergercorp
                  has any knowledge that any party has asserted any claim of
                  such nature against BOKF or Mergercorp.

        5.8       SEC DOCUMENTS AND FINANCIAL STATEMENTS. BOKF has furnished or
                  made available to First Muskogee and First Muskogee Bank a
                  true and complete copy of each statement, annual, quarterly,
                  registration statement and other report filed with the
                  Securities and Exchange Commission ("SEC") since December 31,
                  1997, other than preliminary material (the "BOKF SEC
                  Documents). The BOKF SEC Documents are all documents required
                  to be filed by BOKF since such date. As of their respective
                  filing dates, the BOKF 


   22


                  SEC Documents complied in all material respects with the
                  requirements of the Securities Act of 1933 and the Securities
                  Exchange Act of 1934, as the case may be, and none of the
                  BOKF SEC Documents contained any untrue statement of a
                  material fact or omitted to state a material fact necessary
                  in order to make the statements therein, in light of the
                  circumstances in which they were made, not misleading, except
                  to the extent corrected by a subsequently filed BOKF SEC
                  Document. The financial statements of BOKF in the BOKF SEC
                  Documents (the "BOKF Financial Statements") comply as to form
                  in all material respects with applicable accounting
                  requirements and with the published rules and regulations of
                  the SEC with respect thereto, have been prepared in
                  accordance with generally accepted accounting principles
                  consistently applied (except as may be indicated in the notes
                  thereto or, in the case of unaudited statements, as permitted
                  by Form 10Q of the SEC) and fairly present the consolidated
                  financial position of BOKF and its consolidated subsidiaries
                  at the dates thereof and the consolidated results of their
                  operations and cash flows for the periods then ended
                  (subject, in the case of unaudited statements to normal,
                  recurring audit adjustments). There have been no changes in
                  BOKF's accounting policies or estimates except as described
                  in the notes to the BOKF Financial Statements.

        5.9       SURVIVAL AND INDEPENDENCE OF REPRESENTATIONS AND WARRANTIES.
                  The representations and warranties of BOKF and Mergercorp
                  made in this Merger Agreement shall survive the Closing
                  hereof notwithstanding any investigation or knowledge of the
                  Principal Shareholders; provided Holders shall give notice to
                  BOKF on or before the Claim Notice Deadline of any 


   23


                  claim of a breach of any such representations and warranties.
                  Each of the representations and warranties of BOKF and
                  Mergercorp set forth in this Merger Agreement is a separate
                  and independent representation and warranty, shall be
                  cumulative of and in addition to all other warranties and
                  representations; and shall not limit any other representation
                  or warranty made herein.

        5.10      BOKF AND MERGERCORP INDEMNIFICATION. BOKF and Mergercorp
                  shall indemnify Holders against, and hold Holders harmless
                  from, all loss, cost and expense (including interest at the
                  judgment rate and attorney's fees) arising out of any breach
                  by BOKF and Mergercorp of any representation or warranty made
                  in this Merger Agreement; provided, Agent shall, on or before
                  the Claim Notice Deadline, give notice of any breach of such
                  representations and warranties to BOKF and Mergercorp on the
                  request of a majority in interest of the Holders.

6.      COVENANTS.

        6.1       FULL ACCESS. In order that BOKF shall have the full
                  opportunity to make such investigations as it shall
                  reasonably desire concerning First Muskogee and First
                  Muskogee Bank and their business affairs, First Muskogee and
                  First Muskogee Bank shall:


                  6.1.1    Give BOKF, its employees, counsel, accountants and
                           other authorized representatives, as necessary to
                           conduct the investigation and whose names shall have
                           been provided to First Muskogee, full access, upon
                           reasonable notice to First Muskogee and at
                           reasonable times without unduly 

   24


                           interfering with the conduct of business by First
                           Muskogee and First Muskogee Bank throughout the
                           period up to the Closing, to all of the facilities,
                           properties, books, contracts and records of First
                           Muskogee and First Muskogee Bank.

                  6.1.2    Authorize its accountants to give BOKF full access
                           to the accountant's records, including work papers;
                           and,

                  6.1.3    Furnish to BOKF during that period all additional
                           financial, operating and other information
                           concerning First Muskogee and First Muskogee Bank
                           and their business affairs, as BOKF may reasonably
                           request and which First Muskogee and First Muskogee
                           Bank shall have available.

                  6.1.4    All information provided pursuant to this Section
                           6.1 shall be subject to the provisions of Section
                           6.7.

        6.2       CONDUCT OF BUSINESS PRIOR TO THE CLOSING DATE. From this date
                  until the Closing Date, each of First Muskogee and First
                  Muskogee Bank shall, except as may be first approved in
                  writing by BOKF or as is otherwise permitted or contemplated
                  in this Merger Agreement:

                  6.2.1    Maintain their corporate existence in good standing;

                  6.2.2    Maintain the general character of their business and
                           conduct their business in their ordinary and usual
                           manner consistent with past practices;

                  6.2.3    Maintain proper business and accounting records
                           generally in accordance with past practices;

                  6.2.4    Maintain their properties (except repossessed and
                           foreclosed 


   25


                           assets acquired in satisfaction of debt previously
                           contracted) in normal repair and condition, normal
                           wear and tear and damage due to fire or other
                           unavoidable casualty excepted;

                  6.2.5    Preserve their business organizations intact, use
                           their reasonable efforts to maintain satisfactory
                           relationships with suppliers, customers and others
                           having business relations with them whose
                           relationships they believe are desirable to
                           maintain, and use their reasonable efforts to
                           procure the willingness of all of the personnel
                           employed by them immediately prior to the execution
                           of this Merger Agreement who are material to the
                           success of their business to continue in their
                           employ on substantially the same terms and
                           conditions as those on which such personnel were
                           employed immediately prior to the execution of this
                           Merger Agreement;

                  6.2.6    Maintain in full force and effect insurance
                           comparable in amount and in scope of coverage to
                           that now maintained by them;

                  6.2.7    Except as otherwise disclosed in this Merger
                           Agreement, perform all of their obligations under
                           all material contracts, leases and agreements
                           relating to or affecting their assets, properties
                           and businesses; and,

                  6.2.8    Comply in all material respects with and perform all
                           obligations and duties imposed upon them by federal,
                           state 


   26


                           and local laws, and all rules, regulations and
                           orders imposed by federal, state or local
                           governmental authorities, except as may be contested
                           by them in good faith by appropriate proceedings.
    
        6.3       FIRST MUSKOGEE AND FIRST MUSKOGEE BANK PROHIBITED ACTIONS
                  PRIOR TO THE CLOSING DATE. From this date until the Closing
                  Date, First Muskogee and First Muskogee Bank shall not
                  (except as otherwise permitted by this Merger Agreement or as
                  requested or approved by BOKF which approval shall not be
                  unreasonably withheld, delayed, or denied): 

                  6.3.1    Incur any indebtedness for borrowed money or incur
                           any noncurrent indebtedness for the purchase price
                           of any fixed or capital asset, or make any extension
                           of credit or any loans to, guarantee the obligations
                           of, or make any additional investments in, any other
                           person, corporation or joint venture (whether an
                           existing customer or a new customer) except: 


                           6.3.1.1  Extensions of credit, loans and guarantees
                                    (i) less than One Million Dollars
                                    ($1,000,000) per transaction or (ii) less
                                    than One Hundred Thousand Dollars
                                    ($100,000) with existing First Muskogee
                                    customers having existing credit of One
                                    Million Dollars ($1,000,000) or more made
                                    by First Muskogee Bank in the usual 


   27


                                    and ordinary course of its banking
                                    business, consistent with prior practices
                                    and policies;

                           6.3.1.2  Legal investments by First Muskogee Bank in
                                    the usual and ordinary course of its
                                    banking business consistent with prior
                                    practices and policies.

                           6.3.1.3  Borrowings from the Federal Home Loan Bank,
                                    the Federal Reserve Bank, deposit
                                    liabilities, and federal funds transactions
                                    by First Muskogee Bank in the ordinary
                                    course of business consistent with past
                                    practices.

                  6.3.2    Make any (a) material change, except in the ordinary
                           and usual course of business, in their assets
                           (including, but not limited to, any change in the
                           composition of such assets so as to materially alter
                           the proportion of cash) or liabilities, (b) material
                           commitment for any capital expenditures, excluding
                           expenditures for repairs and remodeling in the
                           ordinary and usual course of business, or (c) sale
                           or other disposition of any material capital asset
                           other than for fair value in the ordinary course of
                           business;

                  6.3.3    Make any change in their Certificates of
                           Incorporation or Bylaws;

                  6.3.4    Authorize any shares of their capital stock for
                           issuance, issue any shares of any previously
                           authorized but unissued 


   28


                           capital stock or grant, issue or make any option or
                           commitment relating to their capital stock except
                           the issuance of First Muskogee Common Stock upon
                           exercise of the Stock Options;

                  6.3.5    Enter into any letter of intent or agreement to sell
                           any of their assets, except in the normal and
                           ordinary course of their business, or acquire, be
                           acquired by, or merge, consolidate or reorganize
                           with any person, firm or corporation;

                  6.3.6    Declare or pay any dividend, make any other
                           distribution or payment or set aside any amount for
                           payment with respect to any shares of their capital
                           stock or directly or indirectly, redeem, purchase or
                           otherwise acquire any shares of their capital stock
                           or make any commitment relating thereto, provided,
                           however, First Muskogee may (i) pay a dividend in
                           the amount of $750,000 in the first quarter of 1999
                           consistent with past practices, (ii) in addition to
                           the dividend described in the preceding clause (i)
                           and until the Closing, continue to pay quarterly
                           dividends in respect of the First Muskogee Common
                           Stock for the purpose of reimbursing the income tax
                           liability of the holders thereof arising by virtue
                           of the fact that First Muskogee is an "S"
                           corporation under the Internal Revenue Code, such
                           quarterly dividends to be paid at the times and in
                           the amounts and at the same


   29


                           assumed tax rates consistent with the prior
                           practices of First Muskogee (the "S Corporation
                           Dividends"); (iii) pay the S Corporation Dividends
                           immediately prior to the Closing for any income
                           attributable to the stub-period terminating at the
                           Closing for which S Corporation Dividends have not
                           theretofore been paid; (iv) pay a final S
                           Corporation Dividend in respect of calendar year
                           1998 (in the approximate amount of $614,000) in
                           January 1999; (v) First Muskogee Bank may pay
                           dividends in an amount to make available to First
                           Muskogee Bancshares sufficient funds to pay the
                           foregoing described First Muskogee Dividends; and
                           (vi) First Muskogee may repurchase up to twenty (20)
                           shares of First Muskogee Common Stock held by
                           directors of First Muskogee Bank as director's
                           qualifying shares pursuant to existing agreements
                           for a total consideration not exceeding $4,000;

                  6.3.7    Except as set forth in Exhibit 6.3.7, make any (a)
                           increase in the compensation payable or to become
                           payable to any of their directors, officers or
                           employees who are subject to the provisions of
                           Regulation O of the Board of Governors of the
                           Federal Reserve System (including, without
                           limitation, any bonus or incentive payment or
                           agreement), (b) make or enter into any written
                           employment contract or any bonus, stock option,
                           profit sharing, pension, retirement or other 


   30


                           similar payment or arrangement, or (c) make any
                           payment to any person, except in the usual and
                           ordinary course of business or except as required by
                           an existing agreement set forth in the Exhibits
                           hereto;

                  6.3.8    Make any material change in their banking, safe
                           deposit or power of attorney arrangements;

                  6.3.9    Enter into any trust, escrow, agency and similar
                           trust company agreements, purchase orders and
                           contracts for goods and services, except in the
                           ordinary course of business consistent with past
                           practices;

                  6.3.10   Enter into any agreement resulting in the imposition
                           of any mortgage or pledge of their assets or the
                           creation of any lien, charge or encumbrance on any
                           of their assets;

                  6.3.11   Incur any material obligation or liability, absolute
                           or contingent, except in the ordinary course of
                           business or pursuant to existing contracts described
                           in this Merger Agreement;

                  6.3.12   Take any action which would prevent compliance with
                           any of the conditions of this Merger Agreement; or,

                  6.3.13   Increase compensation to any employee except annual
                           increases at the times and in amounts consistent
                           with past practices or pay any bonuses to any
                           employee except as otherwise provided in this Merger
                           Agreement.



   31
        6.4       VOTE FOR MERGER AND WAIVER OF RIGHT TO DISSENT. Each
                  Principal Shareholder shall vote, as a stockholder of First
                  Muskogee, for the Merger and use his or her best efforts to
                  cause the Merger to be approved by the directors and
                  shareholders of First Muskogee and First Muskogee Bank in
                  accordance with applicable law and consummated in accordance
                  with the terms of this Merger Agreement. Each Principal
                  Shareholder hereby irrevocably waives any and all rights to
                  dissent to the Merger.

        6.5       REGULATORY APPROVAL. BOKF shall diligently file and pursue
                  (A) all regulatory applications required in order to
                  consummate the Merger and the merger of First Muskogee Bank
                  into Bank of Oklahoma, National Association, including but
                  not limited to the necessary applications for prior approval
                  of the Board of Governors of the Federal Reserve System and
                  the Office of the Comptroller of the Currency on or before
                  the thirtieth (30th) calendar day following the Agreement
                  Date and (B) thereafter promptly file any required
                  supplements or amendments thereto. All applications,
                  supplements, and amendments shall be substantially complete
                  when filed. BOKF shall deliver to First Muskogee a copy of
                  all such filings, as filed, within three (3) business days
                  after the filing thereof. Although all such filings shall be
                  the responsibility of BOKF, BOKF shall nevertheless advise
                  and consult with First Muskogee on an ongoing basis with
                  respect to the filings and all matters and events related
                  thereto. BOKF shall inform and make available to First
                  Muskogee from time to time all matters relating to the
                  filings and the regulatory approvals. BOKF shall diligently
                  proceed with reasonable deliberate speed to obtain all such
                  approvals. If any regulatory 


   32


                  application required to be filed by BOKF should be finally
                  denied or disapproved by the respective regulatory authority,
                  then BOKF shall immediately give notice to First Muskogee and
                  this Merger Agreement shall thereupon terminate, subject to
                  the provisions of Section 11. However, it is understood that
                  a request for additional information or undertaking by the
                  applicant, as a condition for approval, shall not be deemed
                  to be a denial or disapproval so long as the applicant can
                  reasonably be expected to provide the requested information
                  or undertaking. In the event an application is denied pending
                  an appeal, petition for review, or similar such act on the
                  part of the applicant, then the application will be deemed
                  denied unless the applicant promptly and diligently prepares
                  and files such appeal and continues the appellate process for
                  the purposes of getting the necessary approval.

        6.6       CONFIDENTIALITY. Prior to the Closing, BOKF shall keep all
                  information disclosed to BOKF (its employees, counsel,
                  accountants, and other authorized representatives) by First
                  Muskogee or First Muskogee Bank respecting the business and
                  financial condition of First Muskogee and First Muskogee Bank
                  confidential and shall make no use of such information except
                  to conduct the investigation contemplated by Section 6.4 and
                  to consummate the transactions contemplated hereby and shall
                  not use such information to obtain a competitive advantage in
                  connection with any customer of First Muskogee Bank. In the
                  event this Merger Agreement is terminated for any reason BOKF
                  shall (i) return all copies of all information and documents
                  obtained from First Muskogee, First Muskogee Bank, and
                  


   33


                  Principal Shareholders and (ii) thereafter keep all such
                  information confidential and not make use of any such
                  information to obtain a competitive advantage in connection
                  with any customer of First Muskogee Bank.

        6.7       BOKF PROHIBITED ACTION PRIOR TO CLOSING. From this date until
                  the Closing Date, BOKF shall not take any action which would
                  prevent compliance with any of the conditions of this Merger
                  Agreement. BOKF shall not, and shall cause its subsidiaries
                  not to, make or agree to make any acquisition, or take any
                  other action, that adversely affects its ability to
                  consummate the transactions contemplated by this Merger
                  Agreement and will otherwise continue to conduct its business
                  operations and shall cause the operations of its subsidiaries
                  to be conducted in a manner consistent with past operating
                  practices.

        6.10      ACCOUNTING OPINION. BOKF shall promptly request and obtain
                  the opinion of Ernst & Young whether the Merger is properly
                  accounted for as a pooling of interests in accordance with
                  A.P.B. No. 16. BOKF and First Muskogee shall each use
                  commercially reasonable efforts to cause the Merger to be
                  accounted for as a pooling of interests.

        6.11      TAX OPINION. First Muskogee and BOKF shall each promptly
                  request and obtain an opinion of Crowe & Dunlevy addressed
                  separately to each of them whether the Merger is a tax free
                  reorganization in accordance with Section 368(a)(2)(D) of the
                  Internal Revenue Code. BOKF and First Muskogee shall each use
                  commercially reasonable efforts to cause the Merger to be a
                  tax free reorganization in accordance with the Internal
                  Revenue Code.


   34


        6.12      EMPLOYMENT AGREEMENT. Contemporaneously herewith, Michael S.
                  Leonard ("Leonard") and BOKF and First Muskogee shall enter
                  into an employment agreement in the form and content of
                  Exhibit 6.12.1 (the "Leonard Employment Agreement"). Leonard
                  hereby accepts, and shall contemporaneously with the
                  execution and delivery of this Merger Agreement, execute and
                  deliver to BOKF the Leonard Employment Agreement.

        6.13      EMPLOYMENT TRANSITIONS UPON CLOSING. BOKF shall cause or
                  permit BOk or First Muskogee Bank to perform those
                  obligations described in Exhibit 6.13 attached hereto.

        6.14      FIRST MUSKOGEE COVENANT TO OBTAIN APPROVALS. First Muskogee
                  shall promptly seek and use commercially reasonable efforts
                  to obtain the approval of this Merger Agreement and the
                  transactions contemplated hereby by the shareholders of First
                  Muskogee. First Muskogee Bank shall enter into an agreement
                  to merge with BOk, subject to the Closing of this Merger
                  Agreement, in form and content acceptable to BOKF.

        6.15      COVENANTS RESPECTING EMPLOYMENT AND NON-COMPETITION
                  AGREEMENTS. BOKF and First Muskogee shall use commercially
                  reasonable efforts to



   35



                  cause all employment and non-competition agreements which are
                  a condition precedent to the obligations of BOKF under this
                  Merger Agreement to be executed and delivered.

        6.16      EMPLOYMENT BENEFITS. Following the Closing, BOKF shall cause
                  all employees of First Muskogee Bank to have the same
                  benefits provided by BOKF generally to employees of BOKF and
                  its affiliates. Employees of First Muskogee Bank shall be
                  credited for their actual and credited service with First
                  Muskogee Bank for purposes of eligibility, vesting and
                  beneficial accrual for all BOKF employee benefit plans
                  including the BOKF 401k plan; provided, however, such
                  employees shall not be credited with prior service in BOKF's
                  defined benefit pension plan. First Muskogee Bank employees
                  shall not be subject to any exclusions for pre-existing
                  conditions under BOKF's medical benefit plan and shall
                  receive credit for any deductibles or out-of-pocket expenses
                  previously paid.

        6.17      PUBLICATION OF COMBINED FINANCIAL RESULTS. BOKF shall file
                  with the SEC a report (on SEC Form 8K, Form 10K, or Form 10Q)
                  containing financial statements which include no less than 30
                  days of combined operations of BOKF and First Muskogee, not
                  later than the fifteenth (15th) day of the month next
                  following the first full calendar month of combined
                  operations.

        6.18      TAX RETURN. BOKF shall cause the final S Corporation tax
                  return for First Muskogee to be prepared in a manner
                  consistent with First Muskogee's past practices, including
                  providing information to the Holders relating to their
                  increase in basis of First Muskogee Common Stock. Such return
                  will be prepared based on a closing of the First Muskogee
                  books as of the Closing Date.


   36

        6.19      ITI-UNISYS CONTRACT. First Muskogee shall terminate the
                  ITI-Unisys Contract.

7.      CONDITIONS PRECEDENT TO CLOSING BY BOKF AND MERGERCORP. The obligation
        of BOKF and Mergercorp to consummate and close this transaction is
        conditioned upon each and all of the following:


        7.1       The representations, warranties and covenants of First
                  Muskogee and First Muskogee Bank shall be materially true at
                  the Closing as though such representations, warranties and
                  covenants were also made at the Closing.

        7.2       The Federal Reserve Board shall have approved the Merger, or
                  issued a waiver of approval, in accordance with 12 U.S.C.
                  Section 1842 and 12 C.F.R. Section 225. The Office of the
                  Comptroller of the Currency shall have approved the merger of
                  First Muskogee Bank into BOk in accordance with 12 U.S.C.
                  Section 215a and 12 C.F.R. 5.33, and such other regulatory
                  approval as may be required is obtained.

        7.3       First Muskogee, First Muskogee Bank and Principal
                  Shareholders shall have performed and complied with, in all
                  material respects, all of their obligations under this Merger
                  Agreement which are to be performed or complied with by them
                  prior to or on the Closing Date.

        7.4       First Muskogee shall have delivered to BOKF an opinion of its
                  counsel, dated the Closing Date, in the form and content of
                  the opinion attached hereto as Exhibit 7.4.

        7.5       BOKF shall have received an opinion of Ernst & Young that the
                  Merger is appropriately accounted for as a pooling of
                  interest in accordance with A.P.B. No. 16.


   37


        7.6       The shareholders of First Muskogee shall have approved this
                  Merger Agreement in accordance with the Oklahoma General
                  Corporation Act. First Muskogee Bank shall have entered into
                  an agreement to merge with BOk, subject to the Closing of
                  this Merger Agreement, in form and content acceptable to
                  BOKF.

        7.7       Contemporaneously herewith, each of Leonard, Chris Condley,
                  and David Thompson shall have entered into employment
                  agreements, subject to the Closing of this Merger Agreement,
                  acceptable in form and content to BOKF. Each director of
                  First Muskogee and First Muskogee Bank, which BOKF deems
                  critical in BOKF's good faith judgment, shall, prior to or at
                  the Closing, have entered into a non-competition agreement in
                  the form of Exhibit 7.7.

        7.8       Neither First Muskogee taken as a whole or First Muskogee
                  Bank taken as a whole shall have suffered any material
                  adverse change in their financial conditions, assets,
                  liabilities, businesses or properties.

        7.9       Holders of no more than eight percent (8%) of the First
                  Muskogee Common Stock shall have exercised appraisal rights
                  under Section 1091 of the Oklahoma General Corporations Act.

        7.10      BOKF shall have received an opinion of Crowe & Dunlevy
                  addressed to BOKF that the Merger is a tax free reorganization
                  in accordance with Internal Revenue Code Section 368(a)(2)(D).

        In the event any one or more of these conditions shall not have been
        fulfilled prior to or at the Closing, BOKF and Mergercorp may terminate
        this Merger Agreement by written notice


   38


        to First Muskogee, in which event neither party shall have any further
        obligation or liability to the other except the obligations of BOKF set
        forth in Section 6.7 and Section 11 and the obligations of First
        Muskogee and First Muskogee Bank set forth in Section 4.11 and Section
        12. BOKF shall be entitled to waive compliance with any one or more of
        the conditions, representations, warranties or covenants in whole or in
        part.

8.      CONDITIONS PRECEDENT TO CLOSING BY FIRST MUSKOGEE. The obligation of
        First Muskogee and First Muskogee Bank to consummate and close this
        transaction are conditioned upon each and all of the following:

        8.1       The representations, warranties and covenants of BOKF and
                  Mergercorp made in this Merger Agreement shall be true at the
                  Closing as though such representations, warranties and
                  covenants were also made at the Closing.

        8.2       BOKF and Mergercorp shall have performed and complied, in all
                  material respects, with all of their obligations under this
                  Merger Agreement which are to be performed or complied with
                  by them prior to or at the Closing.

        8.3       BOKF shall have delivered to the Holders an opinion of its
                  counsel, Frederic Dorwart, Tulsa, Oklahoma, dated the Closing
                  Date, in the form and content of the opinion attached hereto
                  as Exhibit 8.3.

        8.4       The Federal Reserve Board shall have approved the Merger, or
                  issued a waiver of approval, in accordance with 12 U.S.C.
                  Section 1842 and 12 C.F.R. Section 225. The Office of the
                  Comptroller of the Currency shall have approved the merger of
                  First Muskogee Bank into BOk in accordance with 12 U.S.C.
                  Section 215a and 12 C.F.R. 5.33, and such other regulatory
                  approval as may be required is obtained.



   39


        8.5       There shall have been no material and adverse change in the
                  financial condition, results of operations, assets, business
                  or properties of BOKF taken as a whole.

        8.6       First Muskogee shall have received an opinion of Crowe &
                  Dunlevy addressed to the shareholders of First Muskogee that
                  the Merger is a tax free reorganization in accordance with
                  Internal Revenue Code Section 368(a)(2)(D).

        8.7       The Holders shall have approved this Merger Agreement and the
                  transactions contemplated hereby as required by the Oklahoma
                  General Corporations Act.

        First Muskogee shall be entitled to waive compliance with any one or
        more of the conditions, representations, warranties or covenants in
        whole or in part. In the event any one or more of these conditions
        shall not have been fulfilled prior to or at the Closing, First
        Muskogee may terminate this Merger Agreement by notice to BOKF, in
        which event no party shall have any further obligation or liability to
        the other, except the obligations of BOKF set forth in Section 6.7 and
        Section 11 and the obligations of First Muskogee set forth in Section
        12.

9.      CLOSING. The Closing ("Closing" or "Closing Date") of the transactions
        contemplated by this Merger Agreement shall take place five (5)
        business days following the first day on which (i) BOKF and Mergercorp
        can lawfully consummate the Merger under 12 U.S.C. Section 1842, 12
        C.F.R. Section 225 and other applicable laws, rules and regulations and
        (ii) BOk and First Muskogee Bank can merge under 12 U.S.C. Section
        215a, and 12 C.F.R. Section 5.23 and other applicable laws, rules and
        regulations. In any event, if the Closing Date does not occur on or
        before June 1, 1999, then either BOKF or First Muskogee may by notice
        to the other, terminate this Merger Agreement, provided such notice is
        given on or before June 15, 1999; and provided further such termination
        shall be subject to the


   40


        provisions of Section 11 or Section 12, as the case may be. The Closing
        shall be held at 10:00 a.m. on the Closing Date at the offices of First
        Muskogee Bank or at such other time and place as BOKF and First
        Muskogee may agree. At the Closing, BOKF, Mergercorp, First Muskogee,
        and Principal Shareholders shall execute and deliver all of the
        documents and take all other actions which are contemplated by the
        terms hereof.

        9.1       Without limiting the generality of Section 9 of this Merger
                  Agreement, the following actions shall be taken at the
                  Closing concurrently. First Muskogee shall:

                  9.1.1    Use commercially reasonable efforts to cause to be
                           delivered to Mergercorp certificates representing
                           the First Muskogee Common Stock;

                  9.1.2    Deliver the opinion of First Muskogee's counsel
                           pursuant to Section 7.4; and,

                  9.1.3    Except as otherwise set forth on Exhibit 9.1.3,
                           cause the employment agreements, plans and payments
                           described in Exhibit 4.15 to be terminated and
                           discharged at no cost to First Muskogee and First
                           Muskogee Bank.

        9.2       Without limiting the generality of Section 9 of this Merger
                  Agreement, the following actions shall be taken at the
                  Closing concurrently. BOKF shall:

                  9.2.1    Issue and deliver to Mergercorp certificates to
                           evidence the conversion of the First Muskogee Common
                           Stock into shares of BOKF, as provided in Section
                           2.7 subject to adjustment in accordance with the
                           next sentence. In the event that BOKF shall, on or
                           prior to the Closing Date, 



   41


                           (a) declare or pay to the holders of its Common
                           Stock a dividend payable in any kind of shares of
                           stock or other equity securities of BOKF, (b) change
                           or divide or otherwise reclassify its Common Stock
                           into the same or a different number of shares of any
                           class or classes or authorize any such change,
                           division or reclassification, (c) consolidate or
                           merge with, or transfer its property as an entirety
                           or substantially as an entirety to, any other
                           corporation or entity or authorize any such
                           consolidation, merger or transfer, or (d) make any
                           distribution of its assets to holders of its Common
                           Stock as a liquidation or partial liquidation,
                           dividend or by way of return of capital or authorize
                           any such distribution, then BOKF shall issue and
                           deliver such additional shares of stock of BOKF, or
                           such reclassified shares of stock of BOKF, or such
                           shares of the securities or property of BOKF
                           resulting from such consolidation or merger or
                           transfer, or such assets of BOKF, which the Holders
                           would have been entitled to receive had the Holders
                           been shareholders of BOKF immediately prior to the
                           happening of any of the foregoing events.

                  9.2.2    Deliver the opinion of BOKF's counsel pursuant to
                           Section 8.3.

                  9.2.3    Cause appropriate evidences of merger to be filed in
                           accordance with applicable law.



   42


        9.3       Without limiting the generality of Section 9 of this Merger
                  Agreement, the following actions shall be taken at the Closing
                  concurrently. Mergercorp shall deliver the BOKF Shares to the
                  record holders (as of a date set by First Muskogee which date
                  shall be not later than five business days preceding the
                  Closing) of First Muskogee Common Stock in accordance with
                  Section 2.7.

10.     PROVISIONS RESPECTING BOKF SHARES. The following provisions shall apply
        to all BOKF Shares issued in accordance with this Merger Agreement (the
        "BOKF Shares"):

        10.1      Each Principal Shareholder individually represents and
                  warrants to BOKF that:

                  10.1.1   Such Principal Shareholder is not acquiring the BOKF
                           Shares with a view to further distribution and shall
                           not sell any BOKF Shares until such BOKF Shares
                           shall have been registered under the Securities Act
                           of 1933 and any applicable Blue Sky Act or are sold
                           in a transaction exempt from such registration.

                  10.1.2   Such Principal Shareholder is acquiring the BOKF
                           Shares for his own account.

        10.2      On the terms and conditions set forth in this Section 10, (i)
                  BOKF shall, on the next business day following the Closing,
                  file an SEC registration statement on Form S-3 for the offer
                  and sale of BOKF Common Stock by Holders of the BOKF Shares
                  received by them pursuant to Section 2.7 (the "Holders
                  Registration"), in non-underwritten transactions from time to
                  time, and use BOKF's best efforts to cause such registration
                  statement to become effective, and (ii) in addition, BOKF
                  shall, on or before December 31, 1999, 


   43


                  at a time to be determined by BOKF in the exercise of its
                  sole discretion (without any obligation to provide any
                  explanation for the exercise of such discretion), file a
                  registration statement for an underwritten primary and/or
                  secondary offering (the "Underwritten Registration") with the
                  SEC and with the comparable state securities commissions in
                  such states (the securities laws of which are collectively
                  called the "Blue Sky Acts") as BOKF shall in the exercise of
                  its sole discretion (without any obligation to provide any
                  explanation for the exercise of such discretion) determine
                  and use BOKF's best efforts to cause such registration
                  statement to become effective. The Holders Registration and
                  the Underwritten Registration are hereafter individually and
                  collectively called the "registration" or "registration
                  statement"). The registration shall be on the following terms
                  and conditions: 

                  10.2.1   Michael S. Leonard shall be the representative of
                           Holders to serve as their agent for the performance
                           of all obligations, and the exercise of all rights
                           arising under this Section, Section 4 and Section 5
                           ("Agent"). The Holders may change their designated
                           Agent, prospectively only, to any other person or
                           entity upon notice thereof to BOKF signed by a
                           majority in interest of all Holders then owning the
                           BOKF Shares. The Agent shall not be deemed a
                           fiduciary of Holders and shall be liable to Holders
                           only for gross negligence or intentional wrongdoing.

                  10.2.2   The registration statement shall be filed in
                           compliance with the Securities Act of 1933 and the
                           Blue Sky Acts.



   44


                  10.2.3   BOKF shall pay all costs of the registration
                           (including filing fees, legal, accounting, printing,
                           and transfer agent costs), excluding Holders legal
                           fees, and underwriting discounts and commissions.
                           BOKF shall make available to Holders such number of
                           prospectus as Agent may reasonably request.

                  10.2.4   BOKF shall submit all registration documents to
                           Agent, reasonably in advance of filing or finalizing
                           such documents and shall receive, consider and
                           accept or reject (in BOKF's reasonable discretion)
                           such comments as Agent shall timely make. BOKF shall
                           file the registration statement in accordance with
                           all applicable laws.

                  10.2.5   BOKF represents and warrants that the registration
                           statement (including any prospectus) will (i)
                           contain all statements respecting BOKF (and its
                           subsidiaries) which are required to be stated
                           therein in accordance with the Securities Act of
                           1933 and the Blue Sky Acts, (ii) conform in all
                           material respects with the applicable requirements
                           of such acts, and (iii) will not contain any untrue
                           statement of a material fact concerning BOKF (and
                           its subsidiaries), or fail to state any material
                           fact necessary to make the statements therein
                           concerning BOKF (and its subsidiaries) not
                           misleading.

                  10.2.6   Agent shall cooperate with BOKF in the registration
                           as may be appropriate.


   45


                  10.2.7   BOKF shall keep Agent reasonably advised of the
                           status of the registration including any
                           underwriting agreements into which BOKF may enter as
                           hereafter provided.

                  10.2.8   Except for the Holders Registration and the
                           Underwritten Registration, BOKF shall have no
                           obligation to register the BOKF Shares.

                  10.2.9   In the Underwritten Registration, BOKF may combine
                           the registration of the BOKF Shares issued by BOKF
                           with shares of BOKF Common Stock held by others,
                           including affiliates of BOKF. BOKF shall notify
                           Agent reasonably in advance of its intention to file
                           the Underwritten Registration and, in the event the
                           Agent so requests, shall combine the registration of
                           the BOKF Shares (or such number of BOKF Shares as
                           the Agent may request) with the other shares of BOKF
                           Common Stock being offered (whether to be issued by
                           BOKF or sold for the account of others including
                           affiliates of BOKF). In the event some or all of the
                           BOKF Shares are offered in the Underwritten
                           Registration, (i) such BOKF Shares shall be offered
                           for sale pursuant to such underwriting agreements
                           (and the terms and provisions thereof, including
                           such allocations among selling shareholders) as BOKF
                           shall in good faith enter with underwriters and (ii)
                           the Holders offering such 


   46


                           BOKF Shares shall pay their proportionate share of
                           any selling or underwriting fees and commissions
                           incurred in connection with an Underwritten
                           Registration.

                  10.2.10  Upon at least three (3) business days prior written
                           notice by BOKF given to the Agent specifying a
                           ninety (90) calendar day period commencing in 1999
                           (the "Lockup Period") those Holders owning more than
                           2,000 shares of First Muskogee Common Stock as of
                           the date hereof ("Lockup Shareholders") shall not
                           offer or sell BOKF Shares pursuant to the Holders'
                           Registration during the Lockup Period, except in
                           non-NASDAQ privately negotiated transactions.



   47



                  10.2.11  If at any time, BOKF has material information not
                           publicly disclosed which, under the applicable
                           regulations of the Securities and Exchange
                           Commission precludes the sale of BOKF Shares without
                           an effective amendment to the registration
                           statement: 10.2.11.1 BOKF shall promptly advise
                           Agent and Agent shall advise Holders to cease
                           effecting sales of the BOKF Shares until an
                           appropriate amendment becomes effective;

                           10.2.11.2  BOKF shall withhold such information from
                                      the public for only the reasonable period
                                      of time a valid reason for such non-
                                      disclosure exists; and,

                           10.2.11.3  BOKF shall promptly file an appropriate
                                      amendment and use its best efforts to
                                      cause the amendment to become effective
                                      on the same terms and conditions as
                                      provided above for the registration
                                      statement.

                           10.2.11.4  BOKF shall use its best efforts to
                                      maintain the effectiveness of the



   48


                                      registration statement for a period of
                                      time from the effectiveness of the
                                      Holders' Registration until the
                                      expiration of two years following the
                                      Closing.

                           10.2.11.5  BOKF shall amend or supplement the
                                      registration statement at the request of
                                      Holders' Agent to name any donee or
                                      pledgee as a selling shareholder.

                  10.2.12  Each Holder offering BOKF Shares for sale pursuant
                           to the registration shall indemnify BOKF, its
                           directors and officers and each person controlling
                           BOKF for any costs or expenses incurred by it or
                           them for any material breach of Holders' agreements
                           under this Section and in respect of any untrue
                           statement of a material fact contained in the
                           registration statement or any omission to state
                           therein a material fact required to be stated
                           therein or necessary to make the statements therein
                           not misleading but only to the extent that such
                           untrue statement or omission is made in such
                           registration statement in reliance upon and in
                           conformity with written information furnished to
                           BOKF by or on behalf of such Holder for use in the
                           preparation of such registration statement or
                           prospectus included 


   49


                           therein. BOKF will indemnify each Holder for any
                           costs or expenses incurred by the Holder for any
                           material breach of BOKF's agreements under this
                           Section or non-compliance with law in respect of
                           this Section and/or in respect of any untrue
                           statement of a material fact contained in the
                           registration statement or any omission to state
                           therein a material fact required to be stated
                           therein or necessary to make the statements therein
                           not misleading, provided that BOKF will not be
                           liable in any such case to the extent that any such
                           cost or expense arises out of or is based upon any
                           untrue statement or omission made in reliance upon
                           and in conformity with written information furnished
                           to BOKF by or on behalf of such Shareholder for use
                           in the preparation of such registration statement or
                           prospectus therein.

                  10.2.13  BOKF shall, from the date of the issuance of the
                           BOKF Shares until the second anniversary of such
                           issuance, maintain its eligibility to use SEC Form
                           S-3 or its equivalent.

                  10.2.14  The representations and warranties made in this
                           Section shall survive for the maximum periods
                           permitted by applicable law.

                  10.2.15  The provisions of this Section 10 are for the
                           express benefit of each of the Holders, but the
                           Holders shall only 


   50


                           be permitted to enforce this Section by action taken
                           solely by Agent on behalf of all Holders determined
                           by the vote of a majority in interest.

        10.3      RESTRICTIONS ON TRANSFER. Each BOKF Share shall be issued
                  subject to the following restrictions:

                  10.3.1   No BOKF Share issued to a person whom BOKF in the
                           exercise of its sole discretion (provided only such
                           discretion is exercised in good faith) determines is
                           an affiliate within the meaning of SEC Rule 405
                           (each herein called an "Affiliate Share") may be
                           sold or otherwise transferred until BOKF shall have
                           published financial statements which reflect at
                           least one month's combined operations subsequent to
                           the Closing.

                  10.3.2   Each certificate representing an Affiliate Share
                           shall bear a restrictive legend evidencing the
                           restriction described in the preceding subsection.

                  10.3.3   Each certificate representing an Affiliate Share
                           shall bear a usual and customary private placement
                           restricted stock legend in addition to the legend
                           described in the preceding subsection and shall be
                           subject to stop transfer orders (as reasonably
                           required); provided, however, at such time as BOKF
                           shall have published financial statements which
                           reflect at least one month's combined operations
                           subsequent to the Closing, and upon the
                           effectiveness of 


   51


                           the Holders' Registration or upon receipt of an
                           opinion of counsel that a proposed sale or other
                           transfer of a specified number of shares of BOKF
                           Common Stock will comply with or be exempt from the
                           Securities Act of 1933, BOKF shall as promptly as
                           practicable after receipt of the stock certificates
                           representing such Affiliate Shares (and, in any
                           event, within seven business days after such
                           receipt) direct BOKF's transfer agent to remove the
                           stop transfer order and reissue a stock certificate
                           evidencing such Affiliate Shares without any
                           restrictive legend.

                  10.3.4   First Muskogee shall use commercially reasonable
                           efforts to obtain agreements from its affiliates
                           acknowledging that the BOKF Shares are subject to
                           the provisions of this Section 10.

                  10.3.5   All certificates representing BOKF Shares shall bear
                           a private placement restrictive legend and the
                           Holders thereof shall not be entitled to sell or
                           transfer any such BOKF Shares except pursuant to the
                           Holders Registration, the Underwritten Registration,
                           or an opinion of counsel to BOKF (which opinion
                           shall not be unreasonably withheld, delayed, or
                           denied) that the transaction is exempt from
                           registration pursuant to the Securities Act of 1933
                           and any applicable Blue Sky Acts.

                  10.3.6   All certificates representing BOKF Shares issued in
                           respect 


   52


                           of shares of First Muskogee Common Stock held by a
                           Lockup Shareholder as of the date hereof shall bear
                           a restrictive legend.

11.     FIRST MUSKOGEE TERMINATION DAMAGES. In the event this Agreement is not
        consummated by reason of a failure of one or more of the conditions
        precedent set forth in Sections 7.5, 8.1, 8.2, 8.3, 8.4 or 8.5 through
        no fault of First Muskogee, then BOKF shall promptly pay First Muskogee
        the sum of One Million Dollars ($1,000,000) as an amount to compensate
        First Muskogee for damages, and not as a penalty, arising from or in
        connection with such termination and failure to consummate the Merger,
        which amount BOKF and First Muskogee agree would be very difficult to
        determine and which agreed amount BOKF and First Muskogee agree is fair
        and reasonable.

12.     BOKF TERMINATION DAMAGES. In the event this Agreement is not
        consummated by reason of a failure of one or more of the conditions
        precedent set forth in Sections 7.1, 7.2 (but only in the event such
        condition fails because of a breach by First Muskogee or First Muskogee
        Bancshares of a promise, covenant, representation or warranty set forth
        in this Merger Agreement), 7.3, 7.4, 7.6, 7.7, and 7.8 through no fault
        of BOKF, then First Muskogee shall promptly pay BOKF the sum of Two
        Hundred Fifty Thousand Dollars ($250,000) as an amount to compensate
        BOKF for damages, and not as a penalty, arising from or in connection
        with such termination and failure to consummate the Merger, which
        amount BOKF and First Muskogee agree would be very difficult to
        determine and which agreed amount BOKF and First Muskogee agree is fair
        and reasonable.

13.     THE BOKF COMMON STOCK ESCROW. The BOKF Common Stock Escrow shall be
        established on the following terms and conditions:

        13.1      The escrow agent shall be BOk ("Escrow Agent").


   53


        13.2      The BOKF Common Stock Escrow shall be governed by the
                  standard form of escrow agreement generally in use by BOk
                  (the "Escrow Agreement").

        13.3      BOKF shall deliver the Escrow Shares to the Escrow Agent at
                  the Closing.

        13.4      In the event BOKF claims a breach of the representations and
                  warranties of First Muskogee and First Muskogee Bank arising
                  under this Merger Agreement, BOKF shall give notice of the
                  claim to the Agent (a "Claim"). The notice shall identify the
                  representations and warranties which BOKF claims have been
                  breached and describe in reasonable detail the basis of the
                  Claim.

        13.5      In the event BOKF makes a Claim(s) prior to the Claim Notice
                  Deadline, the Escrow Agent shall continue to hold the Escrow
                  Shares until such Claim(s) is resolved by (i) the mutual
                  agreement of Agent and BOKF or (ii) a final adjudication
                  determining the merits of the Claim(s), at which time the
                  Escrow shall terminate and the Escrow Agent shall pay (a
                  "Claim Payment") the Claim as mutually agreed or finally
                  adjudicated (an "Allowed Claim"); provided, however, Allowed
                  Claims shall be paid only to the extent the total of all
                  Allowed Claims exceeds $100,000.

        13.6      A Claim Payment shall be made by the delivery to BOKF of that
                  number of Escrow Shares determined by dividing the amount of
                  the Allowed Claim by an amount equal to the average of the
                  mid-points between the highest price and the lowest price at
                  which trades occurred (or, in the event of a single trade,
                  the price of such trade) for BOKF Common Stock on NASDAQ on
                  the five (5) trading days on which at least one trade
                  actually occurs immediately preceding the Closing.



   54


        13.7      The Escrow shall terminate at the later of the Claim Notice
                  Deadline or the date on which all timely noticed Claims have
                  been resolved by mutual agreement or final adjudication and
                  all Allowed Claims, if any, shall have been paid.

        13.8      Upon termination of the Escrow all Escrow Shares remaining in
                  the Escrow shall be delivered to Holders in the same
                  proportion as the shares were deposited in the Escrow.

        13.9      The rights of the Holders to receive BOKF Shares from the
                  Escrow shall not be assignable or transferable except by
                  operation of law or by intestacy or with the approval of BOKF
                  (which approval shall not be unreasonably withheld, delayed,
                  or denied) and will not be evidenced by any certificate or
                  other evidence of ownership.

        13.10     BOKF shall pay the fees and costs of the Escrow Agent with
                  respect to the Escrow.

        13.11     The cost, if any, to First Muskogee and First Muskogee Bank
                  of terminating the ITI-Unisys Contract shall be an Allowed
                  Claim.

14.     MISCELLANEOUS PROVISIONS. The following miscellaneous provisions shall
        apply to this Agreement: 




        14.1      All notices or advices required or permitted to be given by
                  or pursuant to this Agreement, shall be given in writing. All
                  such notices and advices shall be (i) delivered personally,
                  (ii) delivered by facsimile or delivered by U.S. Registered
                  or Certified Mail, Return Receipt Requested mail, or (iii)
                  delivered for overnight delivery by a nationally recognized
                  overnight courier service. Such notices and advices shall be
                  deemed to have been 


   55


                  given (i) the first business day following the date of
                  delivery if delivered personally or by facsimile, (ii) on the
                  third business day following the date of mailing if mailed by
                  U.S. Registered or Certified Mail, Return Receipt Requested,
                  or (iii) on the date of receipt if delivered for overnight
                  delivery by a nationally recognized overnight courier
                  service. All such notices and advices and all other
                  communications related to this Agreement shall be given as
                  follows:

                      BOKF and Mergercorp:

                          James A. White, Executive Vice President
                          BOK FINANCIAL CORPORATION
                          P.O. Box 2300
                          Tulsa, OK 74192
                          (918) 588-6853 - Facsimile

                          and

                          Frederic Dorwart, Secretary and General Counsel to
                          BOK Financial Corporation
                          Old City Hall
                          124 East Fourth Street
                          Tulsa, OK 74103
                          (918) 583-8251 - Facsimile

                      First Muskogee, Principal Shareholders,
                      and First Muskogee Bank:

                          Michael S. Leonard
                          215 State Street
                          Muskogee, Oklahoma 74401-6526
                          (918) 684-2737 - Facsimile

                          and

                          Michael M. Stewart
                          Crowe & Dunlevy
                          1800 Mid-America Tower
                          Oklahoma City, OK
                          (405) 272-5238 - Facsimile



   56


                  or to such other address as the party may have furnished to
                  the other parties in accordance herewith, except that notice
                  of change of addresses shall be effective only upon receipt.

        14.2      This Agreement is made and executed in Tulsa County,
                  Oklahoma.

        14.3      This Agreement shall be subject to, and interpreted by and in
                  accordance with, the laws (excluding conflict of law
                  provisions) of the State of Oklahoma.

        14.4      This Agreement is the entire Agreement of the parties
                  respecting the subject matter hereof. There are no other
                  agreements, representations or warranties, whether oral or
                  written, respecting the subject matter hereof.

        14.5      No course of prior dealings involving any of the parties
                  hereto and no usage of trade shall be relevant or advisable
                  to interpret, supplement, explain or vary any of the terms of
                  this Agreement, except as expressly provided herein.

        14.6      This Agreement, and all the provisions of this Agreement,
                  shall be deemed drafted by all of the parties hereto.

        14.7      This Agreement shall not be interpreted strictly for or
                  against any party, but solely in accordance with the fair
                  meaning of the provisions hereof to effectuate the purposes
                  and interest of this Agreement.

        14.8      Each party hereto has entered into this Agreement based
                  solely upon the agreements, representations and warranties
                  expressly set forth herein and upon his own knowledge and
                  investigation. Neither party has relied upon any
                  representation or warranty of any other party hereto except
                  any such representations or warranties as are expressly set
                  forth herein.


   57


        14.9      Each of the persons signing below on behalf of a party hereto
                  represents and warrants that he or she has full requisite
                  power and authority to execute and deliver this Agreement on
                  behalf of the parties for whom he or she is signing and to
                  bind such party to the terms and conditions of this
                  Agreement.

        14.10     This Agreement may be executed in counterparts, each of which
                  shall be deemed an original. This Agreement shall become
                  effective only when all of the parties hereto shall have
                  executed the original or counterpart hereof. This agreement
                  may be executed and delivered by a facsimile transmission of
                  a counterpart signature page hereof.

        14.11     In any action brought by a party hereto to enforce the
                  obligations of any other party hereto, the prevailing party
                  shall be entitled to collect from the opposing party to such
                  action such party's reasonable litigation costs and attorneys
                  fees and expenses (including court costs, reasonable fees of
                  accountants and experts, and other expenses incidental to the
                  litigation).

        14.12     This Agreement shall be binding upon and shall inure to the
                  benefit of the parties and their respective successors and
                  assigns.

        14.13     This is not a third party beneficiary contract except as
                  otherwise expressly stated herein. No person or entity other
                  than a party signing this Agreement shall have any rights
                  under this Agreement except as otherwise expressly stated
                  herein.

        14.14     This Agreement may be amended or modified only in a writing
                  which specifically references this Agreement.

        14.15     This Agreement may not be assigned by any party hereto.

        14.16     A party to this Agreement may decide or fail to require full
                  or timely 


   58


                  performance of any obligation arising under this Agreement.
                  The decision or failure of a party hereto to require full or
                  timely performance of any obligation arising under this
                  Agreement (whether on a single occasion or on multiple
                  occasions) shall not be deemed a waiver of any such
                  obligation. No such decisions or failures shall give rise to
                  any claim of estoppel, laches, course of dealing, amendment
                  of this Agreement by course of dealing, or other defense of
                  any nature to any obligation arising hereunder.

        14.17     The repudiation, breach, or failure to perform any obligation
                  arising under this Agreement by a party after reasonable
                  notice thereof shall be deemed a repudiation, breach, and
                  failure to perform all of such party's obligations arising
                  under this Agreement.

        14.18     Time is of the essence with respect to each obligation
                  arising under this Agreement. The failure to timely perform
                  an obligation arising hereunder shall be deemed a failure to
                  perform the obligation.

        14.19     Any cause of action for a breach or enforcement of, or a
                  declaratory judgment respecting, this Agreement shall be
                  commenced and maintained only in the United States District
                  Court for the Northern District of Oklahoma or the applicable
                  Oklahoma state trial court sitting in Tulsa, Oklahoma and
                  having subject matter jurisdiction.

        14.20     All actions taken and documents delivered at the Closing
                  shall be deemed to have been taken and executed
                  simultaneously and no action shall be deemed taken nor any
                  document delivered until all have been taken and delivered.

Dated and effective the date first set forth above.




   59

                              FIRST BANCSHARES OF MUSKOGEE, INC.,
                              an Oklahoma Corporation

                         By   /s/ Michael S. Leonard
                           ----------------------------------------------------
                              Michael S. Leonard, Vice President

                              FIRST NATIONAL BANK AND TRUST COMPANY
                              OF MUSKOGEE

                         By    /s/ Michael S. Leonard
                           ----------------------------------------------------
                              Michael S. Leonard, President

                         Principal Shareholders of First Bancshares of
                         Muskogee, Inc. (As Set Forth On Exhibit 1.3)

                              /s/ Chris Condley
                           ----------------------------------------------------
                              Chris Condley

                              /s/ David Guthery
                           ----------------------------------------------------
                              David or Jeanie Guthery

                              /s/ Robert Krumme
                           ----------------------------------------------------
                              Robert Krumme

                              /s/ Robert Krumme
                           ----------------------------------------------------
                              Robert Krumme, as Custodian for Carolyn Krumme

                              /s/ Robert Krumme
                           ----------------------------------------------------
                              Robert Krumme, as Custodian for John Krumme

                              /s/ Courtney Lamont
                           ----------------------------------------------------
                              Courtney Lamont

                              /s/ Hank Leonard
                           ----------------------------------------------------
                              Hank Leonard, Trustee of the Courtney Lamont Trust

                              /s/ Amy Leonard
                           ----------------------------------------------------
                              Amy Leonard

                              /s/ Hank Leonard
                           ----------------------------------------------------
                              Hank Leonard, Trustee of the Amy Leonard Trust

                              /s/ Carlene Leonard
                           ----------------------------------------------------
                              Carlene Leonard, Trustee of the 
                              Carlene Leonard Trust

                              /s/ Harry Leonard
                           ----------------------------------------------------
                              Harry Leonard, Trustee of the Harry Leonard Trust

                              /s/ Hank Leonard
                           ----------------------------------------------------
                              Hank Leonard



   60


                              /s/ Michael Leonard
                           ----------------------------------------------------
                              Michael Leonard, Trustee of the 
                              Michael Leonard Trust

                              /s/ Robert List
                           ----------------------------------------------------
                              Robert List

                              /s/ Bob Smith
                           ----------------------------------------------------
                              Bob Smith

                              /s/ Robert N. Yaffe
                           ----------------------------------------------------
                              Robert N. Yaffe

                              BOK FINANCIAL CORPORATION

                         By    /s/ James A. White  
                           ----------------------------------------------------
                              James A. White, Executive Vice President

                              BOKF MERGER CORPORATION NUMBER SEVEN

                         By    /s/ James A. White  
                           ----------------------------------------------------
                              James A. White, Vice-President





   61



                                  EXHIBIT 1.3
                                       TO
                                MERGER AGREEMENT

                             Principal Shareholders



                                                                                  # OF SHARES
                                                                                       
        Chris Condley                                                                     410
        David or Jeanie Guthery                                                         2,930
        Robert Krumme                                                                   3,079
        Robert Krumme, as Custodian for Carolyn Krumme                                    571
        Robert Krumme, as Custodian for John Krumme                                       571
        Courtney Lamont                                                                 1,229
        Hank Leonard, Trustee of the Courtney Lamont Trust                                750
        Amy Leonard                                                                     1,229
        Hank Leonard, Trustee of the Amy Leonard Trust                                    750
        Carlene Leonard, Trustee of the Carlene Leonard Trust                             876
        Harry Leonard, Trustee of the Harry Leonard Trust                                 876
        Hank Leonard                                                                    2,408
        Michael Leonard, Trustee of the Michael Leonard Trust                           4,733
        Robert List                                                                     2,390
        Bob Smith                                                                      11,772
        Robert N. Yaffe                                                                 9,000
                                                                                      -------
                                                                                       43,574
        Total Shares Outstanding                                                       81,260

        Percent of Total                                                                 53.5%




   62




                                  EXHIBIT 2.9
                                       TO
                                MERGER AGREEMENT





   63




                                  EXHIBIT 4.3
                                       TO
                                MERGER AGREEMENT

                                  Subsidiaries


                   First Bancshares of Muskogee owns 100% of
                      First Muskogee Insurance Corporation


   64




                                 EXHIBIT 4.6.3
                                       TO
                                MERGER AGREEMENT

                              Material Liabilities



        1.        HUD Loan Indemnified

                           Saunders             45,110.29       Current
                           McReynolds           56,617.63       Current

                                               101,727.92

        2.        Sheshunoff Contract - Investment Banking Firm

        3.        Crowe & Dunlevy, Attorneys - Legal Fees

        4.        There has been no reserve for income taxes due to Subchapter
                  S status or arising from termination of S Status due to the
                  Merger.

        5.        Information Technology Inc. Contracts

        6.        Liability Under the Unisys Contracts

        7.        Accrued vacation not on financial statements

        8.        Liabilities described under all other exhibits

        9.        Liabilities under $25,000, which are not material.


   65




                                  EXHIBIT 4.7
                                       TO
                                MERGER AGREEMENT

                Conduct of Business Prior to Closing Exceptions



        1.        Contracts listed on Exhibit 4.9 since 9/30/98.

        2.        Payments permitted by the express terms of the Merger
                  Agreement



   66




                                  EXHIBIT 4.9
                                       TO
                                MERGER AGREEMENT

                           Contracts and Commitments


                  None; except as listed below:

        1.        Contracts with Information Technology Inc.

        2.        Contracts with Unisys

        3.        Tenant leases

        4.        Data Processing Agreement with First Bank & Trust, Wagoner

        5.        SW Bell Contracts

        6.        NW Mutual Life Insurance Contract on M.S. Leonard

        7.        NW Mutual Life Insurance Contract on C.L. Condley

        8.        NW Mutual Life Insurance Contract on Glen Scott

        9.        NW Mutual Life Insurance Contract on Lanny Andrews

        11.       NW Mutual Life Insurance Contract on Letha Hoos

        12.       K-Mart ATM Lease

        13.       NW Mutual Life Insurance Contract on Pam Ford

        First National Bank has notified Information Technology Inc. and Unisys
        of cancellation of the above contracts. This cancellation will cause
        First National Bank to be in default under the contracts.


   67




                                  EXHIBIT 4.10
                                       TO
                                MERGER AGREEMENT

                               Pending Litigation

        1.        Muskogee Title / U.S. Fidelity & Guaranty

        2.        Mike Butler, et al

        3.        Kenneth Mather Bankruptcy Trustee

        4.        Various Actions Where First National Bank is Plaintiff



   68




                                  EXHIBIT 4.15
                                       TO
                                MERGER AGREEMENT

                      Employee Contracts and Benefit Plans


        1.        Melody Diebold - Employment Contract

        2.        Deferred Compensation Plans for: M.S. Leonard, C.L. Condley,
                  Glen Scott, P.L. Ford, Lanny Andrews and Letha Hoos -
                  Attached Schedule

        3.        Stock Option Plan for M.S. Leonard, C.L. Condley and P.L.
                  Ford

        4.        First Bancshares of Muskogee Employees 401(K) Profit Sharing
                  Plan

        5.        Health Plan

        6.        Long Term Disability Plan

        7.        Employee Life Insurance Plan

        8.        Vacation and Sick Leave Plan

        9.        Employee benefits and agreements specifically permitted by
                  the Merger Agreement


   69




                                 EXHIBIT 6.12.1
                                       TO
                                MERGER AGREEMENT

                              Employment Agreement



                   None; except Leonard Employment Agreement.



   70




                                  EXHIBIT 6.13
                                       TO
                                MERGER AGREEMENT

                                  Obligations


        BONUS. BOKF shall cause BOk to pay a bonus ("Bonus") of Ten Thousand
Dollars (less withholding) to each of the following employees of First Muskogee
Bank who are not offered, on or before the Closing, employment by BOk in Tulsa
or Muskogee on terms and conditions, including salary, comparable to their
employment with First Muskogee: L. Andrews, G. Batson, P. Ford, L. Hoos, and G.
Scott. Each bonus shall be paid immediately following the Closing.

        SEVERANCE PAY FOR REDUCTION IN FORCE. In the event any employees of
First Muskogee Bank shall be terminated by BOK as a result of a reduction in
force or without cause on or before the first day of the twelfth (12th)
calendar month following the Closing, BOKF shall cause BOk to pay such
employees severance pay (less usual and customary withholdings) in an amount
equal to each such employee's regular salary (excluding bonuses, incentive
compensation, and the like) for four weeks plus one week for each full year of
employment with First Muskogee Bank not exceeding twelve weeks. For the purpose
of determining entitlement to severance pay in accordance with this paragraph,
no First Muskogee Bank employee shall be required to change his place of work
from the Muskogee area.

        CONSUMMATION PAY. BOKF shall cause First Muskogee Bank to pay an
aggregate amount not exceeding $105,000 to First Muskogee Bank employees (which
may be employees receiving benefits under the other provisions of this Exhibit)
for the purpose of ensuring such employees continue to perform their duties
through the date of the consummation of the Merger and the merger of First
Muskogee Bank into BOk, as mutually agreed between the Chief Executive Officer
of First Muskogee Bank and BOKF.

        CHANGE IN CONTROL BONUS POOL. At or immediately before the Closing,
First Muskogee Bank may pay bonuses in the aggregate amount of approximately
$258,398 (including FICA and other indirect costs) to such employees of First
Muskogee Bank as the Chief Executive Officer of First Muskogee Bank determines,
which shall be in addition to the other bonuses and severance payments
permitted by this Merger Agreement.


   71




                                  EXHIBIT 6.3.7
                                       TO
                                MERGER AGREEMENT

                             Compensation Exceptions


        1.        Payments permitted by the express terms of the Merger
                  Agreement

        2.        1998 Stock Options for M.S. Leonard, C.L. Condley and P.L.
                  Ford per Exhibit 2.9

        3.        Employment Agreements with M.S. Leonard, C.L. Condley and
                  David Thompson as contemplated by Merger Agreement


   72




                                  EXHIBIT 7.4
                                       TO
                                MERGER AGREEMENT

                        First Muskogee Counsel's Opinion


           [To be prepared by mutual agreement of counsel to BOKF and
                          counsel to First Muskogee.]


   73



                                  EXHIBIT 7.7
                                       TO
                                MERGER AGREEMENT

                            AGREEMENT NOT TO COMPETE

        This Agreement Not to Compete ("Agreement") is made effective as of
_____________, 199___ (the "Effective Date") between:

             (i)  _____________________ ("Principal"); and,

             (ii) BOK Financial Corporation ("BOKF").

        In consideration of the mutual covenants contained herein, the adequacy
of which is hereby expressly acknowledged, and intending to be legally bound
hereby, Principal and BOKF agree as follows:

        (1)  PURPOSE OF THIS AGREEMENT NOT TO COMPETE. Principal is a key
             officer or director and shareholder of First Muskogee and/or First
             Muskogee Bank. The shareholders of First Muskogee and First
             Muskogee Bank and BOKF are contemporaneously herewith entering
             into that certain Merger Agreement dated effective as of
             ______________, 1998 to which reference is hereby made (the
             "Merger Agreement"). The Merger Agreement constitutes the sale of
             the goodwill of the business of First Muskogee and First Muskogee
             Bank to BOKF. Principal acknowledges that competition by Principal
             with BOKF would damage the goodwill being sold by Principal. The
             purpose of this agreement is to set forth the terms and conditions
             on which Principal agrees not to compete with BOKF. The defined
             terms set forth herein shall have the meanings set forth in the
             Merger Agreement.

        (2)  Principal hereby agrees that, from and after the Closing for one
             year following the closing, Principal shall not directly or
             indirectly (whether as an officer, director, employee, partner,
             stockholder, creditor or agent or representative of other persons
             or entities or in any other manner) engage in the banking business
             in Muskogee County, State of Oklahoma or any county contiguous
             thereto or in such other area where First Muskogee or First
             Muskogee Bank has heretofore regularly conducted business or
             maintained an office.

        (3)  Paragraph 2 hereof shall not apply to any investment by the
             Principal in any widely-held class of securities of any banking
             business, which investment comprises less than 5% of the total
             number of shares of that class of securities outstanding.

        (4)  Principal agrees that:



   74



        (a)  This Agreement is entered into in connection with the sale of the
             goodwill of First Muskogee and First Muskogee Bank within the
             meaning of the laws of Oklahoma relating to agreements not to
             compete.

        (b)  The restrictions imposed by this Agreement (particularly the
             geographical and time restrictions) are fair, reasonable and
             necessary to protect the goodwill of First Muskogee and First
             Muskogee Bank which is being sold to BOKF.

        (c)  Any remedy at law for any breach of this Agreement would be
             inadequate and, in the event of any such breach, BOKF shall be
             entitled to immediate and permanent injunctive relief to preclude
             any such breach (in addition to any remedies at law to which BOKF
             may be entitled) without any necessity of establishing irreparable
             injury or posting bond or security therefore.

        (d)  Without limiting the generality of the obligations imposed by
             Paragraph 2 hereof, Principal agrees that the Principal shall not
             solicit persons or entities who are customers or clients of First
             Muskogee and First Muskogee Bank at the date hereof or solicit
             employees of First Muskogee or First Muskogee Bank to seek
             employment with any person or entity except BOKF and its
             subsidiaries, whether, in either case, such solicitation is made
             within or without the area described in Paragraph 2 hereof.

        (e)  Principal represents that Principal is entering into this
             Agreement in order to induce BOKF to enter into and consummate the
             Merger Agreement and acknowledges that the consideration received
             in the Merger is full and adequate consideration for the promises
             of Principal made herein.

(5)     MISCELLANEOUS. The following miscellaneous provisions shall apply to
        this Agreement:

        (a)  This Agreement is made and executed in Tulsa County, Oklahoma.

        (b)  This Agreement shall be subject to, and interpreted by and in
             accordance with, the laws of the State of Oklahoma (excluding the
             conflicts of law provisions thereof).

        (c)  This Agreement is the entire agreement of the parties respecting
             the subject matter hereof. There are no other agreements, whether
             oral or written, respecting the subject matter hereof.


   75



        (d)  This Agreement may be executed in counterparts, each of which
             shall be deemed an original. This Agreement shall become effective
             only when all of the parties hereto shall have executed the
             original or a counterpart hereof. This Agreement may be delivered
             by facsimile transmission of an executed original or counterpart
             hereof.

        (e)  In any action brought by a party hereto to enforce the obligations
             of any other party hereto, the prevailing party shall be entitled
             to collect from the opposing parties to such action such party's
             reasonable attorneys fees and costs (including court costs,
             reasonable fees of accountants and experts, and other expenses
             incidental to the action).

        (f)  This is not a third party beneficiary contract. No person or
             entity other than an express party hereto shall have any rights
             hereunder.

        (g)  This Agreement shall be binding upon the parties and their
             respective successors and assigns. The rights of the parties under
             this Agreement may not be assigned without the prior written
             consent of the parties hereto.




                              By 
                                 ----------------------------------------------

                              BOK FINANCIAL CORPORATION

                              By 
                                 ----------------------------------------------
                              



   76




                                  EXHIBIT 8.3
                                       TO
                                MERGER AGREEMENT

                             BOKF Counsel's Opinion

             [To be prepared by mutual agreement of counsel to BOKF
                        and counsel to First Muskogee.]


   77



                                 EXHIBIT 9.1.3
                                       TO
                                MERGER AGREEMENT

                        EMPLOYMENT AGREEMENT EXCEPTIONS

        1.        Deferred compensation plans are to remain in effect provided
                  there is no incremental cost to First Muskogee Bank or BOKF.

        2.        Melody Diebold Contract.

        3.        Termination of retirement and medical plans will involve
                  potential routine cost to implement termination.