EXHIBIT 2


        AGREEMENT AND PLAN OF REORGANIZATION Dated December 12, 2002 and
                             Amendment No 1 thereto





                      Agreement and Plan of Reorganization

         This Agreement and Plan of Reorganization ("Plan of Reorganization") is
made and entered into as of the 12th day of December,  2002,  by and between MNB
Holdings  Corporation,  a California  corporation (the "Holding  Company"),  and
Mission National Bank, a national banking association (the "Bank").

         WHEREAS,  the  Bank,  subject  to the  approval  of the  Office  of the
Comptroller  of the Currency  (the "OCC") and upon the  affirmative  vote of the
shareholders  of the  Bank  owning  at least  two-thirds  of its  capital  stock
outstanding,  desires  to  reorganize  so as to  become a  subsidiary  of a bank
holding  company,  registered  under the Bank  Holding  Company Act of 1956,  as
amended (the "BHCA");

         WHEREAS,   the  Board  of   Directors   of  the  Bank  has  caused  the
incorporation  and  organization of the Holding Company for the purposes of said
reorganization;

         WHEREAS,  the Holding Company,  subject to the approval of the Board of
Governors of the Federal Reserve System (the "Federal Reserve  Board"),  desires
to become  the parent  holding  company  of the Bank and to  register  as a bank
holding company under the BHCA; and

         WHEREAS,   the  Bank  and  the  Holding  Company  desire  to  have  the
shareholders of the Bank exchange their shares of common stock,  par value $5.00
per share, for shares of the common stock, no par value, of the Holding Company,
so that all  shareholders  of the Bank (except for those who perfect  dissenting
shareholders'  rights) will become  shareholders of the Holding Company,  on the
terms and conditions hereinafter set forth;

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
contained herein, and intending to be legally bound hereby, the parties agree as
follows:

Section 1. Reorganization

         1.1.  National Bank  Consolidation and Merger Act. Subject to the terms
and  conditions  hereinafter  set forth,  the parties  hereto  agree to effect a
reorganization  of the Bank so as to become a subsidiary of the Holding  Company
(the  "Reorganization")   pursuant  to  the  provisions  of  the  National  Bank
Consolidation and Merger Act, 12 U.S.C.  Section 215a-2 (the "Bank Merger Act"),
and 12 CFR Section 7.2000. The Reorganization shall be carried out in accordance
with the  provisions  of this Plan of  Reorganization,  which is intended by the
parties to  constitute  a  "reorganization  plan" within the meaning of the Bank
Merger Act.

         1.2.   Internal   Revenue   Code.   The  parties   hereto   intend  the
Reorganization  to qualify as a tax-free  transfer within the meaning of Section
351 of the Internal Revenue Code of 1986, as amended.




         1.3. Effect of the Reorganization. By virtue of the Reorganization, and
upon   consummation   of  the   transactions   contemplated   by  this  Plan  of
Reorganization,  each outstanding share of the Common stock, par value $5.00 per
share,  of the Bank (other than any shares as to which  dissenters'  rights have
been  perfected as provided in Section 2.3 hereof),  shall be converted into the
right to receive one (1) share of the Common stock, no par value, of the Holding
Company.  The  corporate  existence of the Bank shall not be deemed to have been
affected in any way by reason of the  Reorganization.  The Bank will continue in
existence as a wholly owned subsidiary of the Holding Company with the same name
("Mission National Bank") and the same national bank charter number as currently
assigned  to the Bank.  All assets,  liabilities,  rights,  duties,  privileges,
immunities,  powers,  franchises  and  interests of the Bank,  of every kind and
description, as existing on the Effective Date of the Reorganization (as defined
below), shall continue in the Bank, without any change or interruption by reason
of the Reorganization; directors, officers and employees of the Bank immediately
prior to the  Effective  Date of the  Reorganization  (as defined  below)  shall
continue to serve as  directors,  officers and  employees  of the Bank,  without
change by reason of the Reorganization;  and neither the rights of creditors nor
any  liens  upon  property  of the  Bank  shall be  impaired  by  reason  of the
Reorganization.

         1.4. Holding Company Common Stock. Immediately after the Effective Date
of the  Reorganization  (as defined below), the Holding Company shall repurchase
all of the  shares of the  Holding  Company's  common  stock that are issued and
outstanding as of the date of this Plan of Reorganization  (the  "Organizational
Shares") in consideration  for the payment to the holder(s) thereof of an amount
equal to the aggregate capital  contribution  theretofore made by such holder(s)
to the Holding Company with respect to such shares.

Section 2. Exchange of Shares

         2.1.  The  Closing.  The  transactions  contemplated  by  this  Plan of
Reorganization  shall become  effective on the closing date selected by the Bank
and the Holding  Company  (the  "Effective  Date"),  after  satisfaction  of the
conditions  set  forth in  Section 7 below,  including  but not  limited  to the
issuance by the OCC of a  certificate  approving the  Reorganization.  As of the
Effective  Date,  each  share  of Bank  common  stock,  issued  and  outstanding
immediately  prior to the  Effective  Date  (other  than  Dissenting  Shares  as
hereinafter  defined)  shall,  by virtue of the  Reorganization  and without any
action on the part of the holder thereof, be converted into the right to receive
one (1) share of Holding Company common stock. At the closing,  the Bank and the
Holding  Company shall use their  respective best efforts to deliver or cause to
be  delivered  to  each  other  and to  third  parties  any  and  all  opinions,
certificates  and other  documents as required to achieve the exchange of shares
contemplated by this Plan of Reorganization.

         2.2.  Exchange Agent. On or immediately prior to the Effective Date, in
accordance  with this Plan of  Reorganization,  the Holding  Company  shall make
available  shares of its  common  stock in  sufficient  amounts  to  effect  the
Reorganization.  As soon as  practicable  after the Effective  Date, the Holding
Company will cause U.S. Stock Transfer  Corporation,  or another qualified trust
company  selected by the Holding Company and the Bank (the "Exchange  Agent") to
send  to  each  shareholder  of the  Bank a  letter  of  transmittal  for use in
exchanging such holder's stock certificate(s) for stock certificates  evidencing
shares of Holding  Company common stock.  Each  shareholder of the Bank shall be
entitled to receive  shares of Holding  Company  common stock for such  holder's
shares of Bank common stock only upon surrender of the certificates representing

                                       2


such holder's  shares of Bank common stock,  or after  providing an  appropriate
affidavit of lost  certificate and indemnity  agreement  and/or a bond as may be
required in each case by the Exchange  Agent.  Until so  surrendered,  each Bank
common stock certificate will be deemed for all corporate  purposes to represent
and evidence  solely the right to receive the amount of Holding  Company  common
stock to be exchanged therefor, pursuant to this Plan of Reorganization.

         2.3.  Dissenting  Shares.  Each share of Bank common  stock  issued and
outstanding  immediately  prior to the Effective  Date,  the holder of which has
voted  against the  Reorganization  and who has  properly  perfected  his or her
dissenter's  rights of appraisal by following  the  procedures  set forth in the
National  Bank Act, is referred to herein as a  "Dissenting  Share."  Dissenting
Shares  owned  by  each  holder  thereof  who  has  not  exchanged  his  or  her
certificates   representing   shares  of  Bank  common  stock  for  certificates
representing  shares of  Holding  Company  common  stock and  otherwise  has not
effectively  withdrawn  or lost  his or her  dissenter's  rights,  shall  not be
converted  into or represent the right to receive  Holding  Company common stock
pursuant to Section 2.1 hereof and shall be entitled  only to such rights as are
available to such holder  pursuant to the applicable  provisions of the National
Bank Act.  Each  holder of  Dissenting  Shares  shall be entitled to receive the
value  of such  Dissenting  Shares  held by him or her in  accordance  with  the
applicable  provisions of the National Bank Act,  provided such holder  complies
with the procedures  contemplated by and set forth in the applicable  provisions
of the National Bank Act. If any holder of Dissenting  Shares shall  effectively
withdraw or lose his or her dissenter's  rights under the applicable  provisions
of the National Bank Act, then such  Dissenting  Shares shall be converted  into
the  right to  receive  Holding  Company  common  stock in  accordance  with the
provisions of Section 2.1 hereof.

         2.4. Stock  Options.  At the close of business on the Effective Date of
the Reorganization, the Holding Company will assume all of the Bank's rights and
obligations  under the Mission  National Bank 1999 Stock Option Plan (the "Stock
Option Plan") and under each outstanding  stock option  agreement  evidencing an
option  (whether an  incentive  stock  option or a  nonstatutory  stock  option)
previously  granted  under the Stock  Option  Plan.  The Stock Option Plan shall
become the "MNB  Holdings  Corporation  Stock Option Plan" and by virtue of such
assumption,  all rights of an optionee  with  respect to the common stock of the
Bank shall become the same right with respect to the common stock of the Holding
Company, on a one-for-one basis. Each such option, subject to such modifications
as may be  appropriate  or  required,  and  subject to the  requirements  of the
Securities Act of 1933, as amended,  and the California Corporate Securities Law
of 1968, shall constitute a continuation of the option, substituting the Holding
Company for the Bank.  The option  vesting period and price per share of Holding
Company  common  stock at which such option may be  exercised  shall be the same
vesting  period and price as were  applicable  to the  purchase  of Bank  common
stock, and all other terms and conditions applicable to the option shall, except
as may be otherwise provided herein, be unchanged.  Each option granted pursuant
to the Stock Option Plan,  from and after the close of business on the Effective
Date of the  Reorganization,  shall  constitute an option granted by the Holding
Company and outstanding  pursuant to the MNB Holdings  Corporation  Stock Option
Plan.  Promptly  after the  Effective  Date of the  Reorganization,  the Holding
Company will  prepare and file with the  Securities  and  Exchange  Commission a
registration  statement on Form S-8 under and pursuant to the  Securities Act of
1933, as amended, for the purpose of registering the maximum number of shares of
the common stock of the Holding  Company to which the holders of options granted
and outstanding,  or to be granted and outstanding,  under the Stock Option Plan
or the MNB Holdings Corporation Stock Option Plan may be entitled.

                                       3


         2.5.  Employee  Benefit Plans.  The Bank and the Holding  Company agree
that the employee  benefit plans of the Bank,  existing at the close of business
on the Effective  Date of the  Reorganization,  including but not limited to the
Mission  National Bank Profit  Sharing and 401(k) Plan and the Mission  National
Bank  Deferred  Compensation  Plan,  shall  be  continued,  terminated,  frozen,
modified or assumed by the Holding  Company in accordance  with  applicable laws
and  regulations  and the  provisions  of the Internal  Revenue Code of 1986, as
amended, as determined by mutual agreement of the parties.

         2.6.  Adjustments.  If, between the date of this Plan of Reorganization
and the Effective Date, the  outstanding  shares of Bank common stock shall have
been changed into a different number of shares or a different class by reason of
any  reclassification,  recapitalization,  split-up,  combination,  exchange  of
shares or  readjustment,  or a stock  dividend  thereon shall be declared with a
record date within such period,  the number of shares of Holding  Company common
stock to be issued and  delivered  in the  Reorganization  in  exchange  for the
outstanding shares of Bank common stock shall be correspondingly adjusted.

         2.7.  Further  Transfers of Bank Stock. At the close of business on the
Effective Date of the Reorganization, the stock transfer books of the Bank shall
be closed and no transfer of shares of Bank common stock theretofore outstanding
shall thereafter be made.

Section 3. Representations and Warranties of Holding Company

         The Holding Company represents, warrants and agrees as follows:

         3.1.  Organization and Standing.  The Holding Company is a corporation,
duly organized and validly existing under the laws of the State of California.

         3.2.  Capitalization.  The Holding  Company is  authorized to issue ten
million  (10,000,000) shares of common stock, no par value, of which one hundred
(100)  shares are  issued and  outstanding.  There are no  outstanding  options,
warrants,  calls, convertible securities,  subscriptions or other commitments or
rights of any nature with respect to the Holding Company common stock.

         3.3. Authority Relative to this Plan of Reorganization.  The execution,
delivery  and  performance  of  this  Plan  of  Reorganization  have  been  duly
authorized  by the  Board  of  Directors  of the  Holding  Company.  Subject  to
appropriate  shareholder  and  regulatory  approvals,  neither the execution and
delivery of this Plan of Reorganization nor the consummation of the transactions
provided for herein will violate any agreement to which the Holding Company is a
party or by which it is bound or any law,  order or decree or any  provision  of
its Articles of Incorporation or Bylaws.

         3.4.  Absence  of  Liabilities.  Prior  to the  Effective  Date  of the
Reorganization,  the Holding Company will have engaged only in the  transactions
contemplated by this Plan of Reorganization,  will have no material  liabilities
and will have incurred no material  obligations  except in  connection  with its
performance of the transactions provided for in this Plan of Reorganization.

                                       4


         3.5. Holding Company Common Stock. The shares of Holding Company common
stock, no par value, to be issued pursuant to this Plan of Reorganization  will,
upon the issuance thereof in accordance with the terms set forth in this Plan of
Reorganization, be validly issued, fully paid and nonassessable.

Section 4. Representations and Warranties of the Bank

         The Bank represents, warrants and agrees as follows:

         4.1.  Organization  and  Standing.  The  Bank  is  a  national  banking
association,  duly  organized and validly  existing under the laws of the United
States of America.

         * 4.2.  Capitalization.  The Bank is authorized to issue 472,500 shares
of common stock,  par value $5.00 per share, of which 452,773 shares were issued
and  outstanding  as of  December  1, 2002.  There are no  outstanding  options,
warrants,  calls, convertible securities,  subscriptions or other commitments or
rights of any nature  with  respect to the Bank common  stock,  except for 5,000
shares under stock option agreements outstanding as of December 1,2002, pursuant
to the Mission National Bank 1999 Stock Option Plan.

         4.3. Authority Relative to this Plan of Reorganization.  The execution,
delivery  and  performance  of  this  Plan  of  Reorganization  have  been  duly
authorized  by the  Board of  Directors  of the  Bank.  Subject  to  appropriate
shareholder and regulatory approvals, neither the execution and delivery of this
Plan of  Reorganization,  nor the consummation of the transactions  provided for
herein,  will violate any  agreement to which the Bank is a party or by which it
is bound or any law,  order,  or  decree or any  provision  of its  Articles  of
Association or Bylaws.

Section 5. Covenants of the Holding Company

         The  Holding  Company  agrees  that  between  the date  hereof  and the
Effective Date of the Reorganization:

         5.1. Regulatory Approvals. The Holding Company shall file all necessary
regulatory applications,  shall diligently seek all other required approvals and
shall take any and all further action as may be necessary or appropriate,  or as
may be reasonably  requested by the Bank, to permit the timely  consummation  of
the Reorganization provided for in this Plan of Reorganization.

         5.2. Approval of Reorganization.  The Board of Directors of the Holding
Company shall diligently seek the approval of this Plan of Reorganization by the
shareholder(s) of the Holding Company, in accordance with applicable law.

         5.3.  Best  Efforts.  The Holding  Company will use its best efforts to
take, or cause to be taken,  all actions or do, or cause to be done,  all things
necessary,  proper  or  advisable  under  applicable  laws  and  regulations  to
consummate  and make  effective the  transactions  contemplated  by this Plan of
Reorganization,  subject,  however, to the requisite vote of the shareholders of
the  Bank in  accordance  with  the  requirements  of the  Bank  Merger  Act and
applicable law.

                                        5


         5.4.  NASDAQ  National  Market.  The  Holding  Company  shall  take all
necessary  action to list the shares of Holding Company common stock for trading
on the Nasdaq National Market, to be effective as soon as practicable  following
the Effective Date.

Section 6. Covenants of the Bank

         The Bank agrees that between the date hereof and the Effective  Date of
the Reorganization:

         6.1.  Shareholders'  Meeting.  The  Bank  shall  submit  this  Plan  of
Reorganization  to the vote of its  shareholders  as provided by the Bank Merger
Act and other  applicable laws at a Special Meeting of Shareholders to be called
by the Board of Directors of the Bank, including any adjournment or postponement
thereof.  The Bank will cooperate with the Holding Company in the preparation of
a prospectus/proxy  statement of the Holding Company and the Bank, to be sent to
the  shareholders  of the  Bank in  connection  with  said  Special  Meeting  of
Shareholders; and notice of the time, place and object of the Special Meeting of
Shareholders  shall  be  published  for four  (4)  consecutive  weeks in a local
newspaper of general circulation and shall be sent to each shareholder of record
by certified or registered  mail at least ten (10) days prior to the date of the
Special Meeting of Shareholders, as required by 12 U.S.C. Section 215a.

         6.2. Best Efforts. The Bank will use its best efforts to take, or cause
to be taken,  all  actions  or do, or cause to be done,  all  things  necessary,
proper or advisable under applicable laws and regulations to consummate and make
effective the transactions contemplated by this Plan of Reorganization, subject,
however,  to the requisite  vote of the  shareholders  of the Bank in accordance
with the requirements of the Bank Merger Act and applicable law.

Section 7. Conditions to Obligations of the Parties

         The   obligations   of  the   parties  to   consummate   this  Plan  of
Reorganization shall be subject to the following conditions;  provided, however,
that any one or more of such  conditions may be waived by the Board of Directors
of the  Holding  Company  and the  Board of  Directors  of the  Bank,  by mutual
agreement, at any time at or prior to the Effective Date of the Reorganization:

         7.1. Representations, Warranties and Covenants. The representations and
warranties  and  covenants  contained  in Sections 3, 4, 5 and 6 hereof shall be
true as of and at the Effective Date of the Reorganization, and each party shall
have performed all  obligations  required  hereby to be performed by it prior to
the Effective Date.

         7.2. Shareholder Approvals. The shareholders of the Holding Company and
the Bank shall have duly approved this Plan of Reorganization in accordance with
applicable laws.

         7.3.  Dissenting  Shares.  Holders of not more than five (5) percent of
the  outstanding  shares of Bank common stock shall have  perfected  dissenters'
rights  pursuant  to 12  U.S.C.  Section  215a (by  voting  against  the Plan of
Reorganization  at the Bank Special  Meeting of Shareholders or by giving notice
in writing at or prior to the Bank Special  Meeting of  Shareholders  that he or
she dissents from the Plan of Reorganization and thereafter  submitting a timely
request  for the value of his or her shares of Bank  common  stock in the manner
required by the National Bank Act).

                                       6


         7.4. Regulatory  Approvals.  The OCC, the Federal Reserve Board and any
other  federal  or state  regulatory  agency  having  jurisdiction  (banking  or
otherwise), to the extent that any consent or approval is required by applicable
laws or regulations  for the  consummation of the  transactions  contemplated by
this Plan of  Reorganization,  shall  have  granted  any  necessary  consent  or
approval.

         7.5.   Registration   Statement.   The   registration   statement  (the
"Registration  Statement") filed by the Holding Company under the Securities Act
of 1933, as amended,  covering the shares of the Holding Company common stock to
be issued pursuant to the Plan of  Reorganization,  shall have become  effective
with the Securities and Exchange  Commission,  and no stop order  suspending the
effectiveness  of the  Registration  Statement  shall  have been  issued  and no
proceeding  for that purpose  shall have been  initiated or, to the knowledge of
the Holding  Company,  shall be contemplated or threatened by the Securities and
Exchange Commission.

         7.6. Litigation.  There shall be no litigation or proceeding pending or
threatened  for  the  purpose  of  enjoining,   restraining  or  preventing  the
consummation of the Reorganization or this Plan of Reorganization,  or otherwise
claiming that such consummation is improper.

         7.7. Consents. The Holding Company and the Bank shall have received all
consents  of third  parties  as may be  required,  including  consents  of other
parties to, and required by.  material  mortgages,  notes,  leases,  franchises,
agreements,  licenses and permits  applicable to the Bank,  and no such consent,
license or permit shall have been withdrawn or suspended.

         7.8.  Legal and Tax  Opinions.  For the  benefit  of the  Bank,  unless
waived,  the Holding  Company  shall have received an opinion from a law firm or
tax  accounting  firm,  in form and  substance  satisfactory  to both,  that the
Reorganization  qualifies as a tax-free  transfer  within the meaning of Section
351 of the Internal Revenue Code of 1986, as amended.

Section 8. Termination, Waiver and Amendment

         8.1. Circumstances of Termination.  Anything herein or elsewhere to the
contrary  notwithstanding,  this Plan of  Reorganization  may be  terminated  at
anytime before the Effective Date of the Reorganization (whether before or after
action with respect thereto by the Bank's shareholders) only:

                  (a) by the  mutual  consent of the Board of  Directors  of the
Bank  and the  Board  of  Directors  of the  Holding  Company,  evidenced  by an
instrument   in   writing   signed  on  behalf  of  each  by  their   respective
representatives; or

                  (b) by the  Board of  Directors  of the  Bank if,  in its sole
judgment,  the  Reorganization  would be  inadvisable  because  of the number of
shareholders of the Bank who perfect their  dissenting  shareholders'  rights in
accordance with  applicable law, or if, in the sole judgment of such Board,  the
Reorganization  would not be in the best interests of the Bank or its employees,
depositors or shareholders for any reason whatsoever.

         8.2.  Effect  of  Termination.  In the  event  of the  termination  and
abandonment  hereof,  this Plan of Reorganization  shall become void and have no
effect,  without  any  liability  on the  part  of any  of  the  parties,  their
directors, officers or shareholders, except as set forth in Section 9 hereof.

                                       7


         8.3.  Waiver.   Any  of  the  terms  or  conditions  of  this  Plan  of
Reorganization  may be waived in writing at any time by the Bank by action taken
by its  Board of  Directors,  whether  before  or  after  action  by the  Bank's
shareholders; provided, however, that such action shall be taken only if, in the
judgment  of the Board of  Directors,  such waiver  shall not have a  materially
adverse  effect  on  the  benefits  intended  to be  granted  hereunder  to  the
shareholders of the Bank.

         8.4.   Amendment.   Anything   herein  or  elsewhere  to  the  contrary
notwithstanding, to the extent permitted by law, this Plan of Reorganization may
be amended  at any time by the  affirmative  vote of a majority  of the Board of
Directors of each of the Bank and the Holding  Company,  whether before or after
action with  respect  thereto by the Bank's  shareholders  and  without  further
approval of such amendment by the shareholders of the parties hereto (subject to
the  shareholder  voting  requirements  of 12 U.S.C.  Section  215a);  provided,
however,  that after such  approval  by the  shareholders  of the Bank,  no such
amendment shall be made which shall affect the rights of the shareholders of the
Bank in a manner  which,  in the judgment of the Board of Directors of the Bank,
is materially adverse to such shareholders, without the further approval of such
shareholders.

Section 9. Expenses

         9.1.  General.  Each party hereto will pay its own expenses incurred in
connection  with this Plan of  Reorganization,  whether or not the  transactions
contemplated herein are effected.

         9.2.  Special  Dividend.  Promptly  after  the  Effective  Date  of the
Reorganization,  the Bank shall pay, as permissible,  a special  dividend to the
Holding Company in an amount equal to the sum of:

                  (a) the expenses incurred by the Holding Company in connection
with the  transactions  contemplated  herein,  and the cost of repurchasing  the
Organizational Shares as contemplated by Section 1.4 above;

                  (b) the  principal  amount of any loan or line of credit  that
the   Holding   Company   shall  have   obtained  to  carry  out  this  Plan  of
Reorganization,  plus any  accrued  and unpaid  interest  and fees with  respect
thereto; and

                  (c) such  additional  funds as may be  needed  by the  Holding
Company as initial working capital.

Section 10. Miscellaneous

         10.1.  Restrictions on Affiliates.  The Holding Company may cause stock
certificates representing any shares issued to any shareholder who may be deemed
to be an  "affiliate"  of the Bank,  within  the  meaning  of Rule 145 under the
Securities  Act of  1933,  as  amended,  to  bear a  legend  setting  forth  any
applicable  restrictions  on  transfer  thereof  under  Rule  145 and may  cause
stop-transfer  orders to be entered with its transfer  agent with respect to any
such certificates.

         10.2. No Brokers.  Each of the parties  represents to the other that it
has not incurred and will not incur any liability for brokerage  fees or agents'
commissions in connection with this Plan of Reorganization  and the transactions
contemplated hereby.

                                       8


         10.3.  Right to  Withhold  Dividends.  The  Board of  Directors  of the
Holding Company reserves the right to withhold dividends or other  distributions
from any  former  shareholder  of the Bank who  fails to  exchange  certificates
representing shares of Bank common stock for certificates representing shares of
Holding  Company  common  stock in  accordance  with  Section  2 of this Plan of
Reorganization.  Upon surrender of such  certificates  representing  Bank common
stock,  the holder  thereof shall be paid,  without  interest,  any dividends or
other  distributions  with respect to the shares of Holding Company common stock
as to which the record date and payment date  occurred on or after the Effective
Date of the Reorganization and on or before the date of surrender.

         10.4. Entire Agreement. This Plan of Reorganization contains the entire
agreement  among the  parties  with  respect to the  subject  matter  hereof and
supersedes all prior agreements, written or oral, with respect thereto.

         10.5. Captions. Descriptive headings are for convenience only and shall
not control or affect the meaning or construction of any provisions of this Plan
of Reorganization.

         10.6.  Applicable Law. This Plan of Reorganization shall be governed by
the laws of the State of California,  applicable to contracts executed in and to
be performed  exclusively within the State of California,  and 12 U.S.C. Section
215a-2 and the other laws of the United States of America applicable to national
banking associations.

         10.7. Counterparts.  This Plan of Reorganization may be executed in any
number  of  counterparts,  and each  such  counterpart  shall be deemed to be an
original instrument, but all such counterparts together shall constitute but one
agreement.

                                        9


IN WITNESS WHEREOF,  this Plan of Reorganization has been executed as of the day
and year first above written.


Attest:                                Mission National Bank


/s/ J. David Joves                     By: /s/ Owen J.Erickson
- ------------------------------             ------------------------------
J. David Joves, Secretary                  Owen J.Erickson, President and
                                           Chief Executive Officer




Attest:                                MNB Holdings Corporation


/s/ J. David Joves                     By: /s/ Owen J.Erickson
- ------------------------------             ------------------------------
J. David Joves, Secretary                  Owen J.Erickson, President and
                                           Chief Executive Officer

                                       10


                        FIRST AMENDMENT TO AGREEMENT AND
                             PLAN OF REORGANIZATION

This First  Amendment to the  Agreement and Plan of  Reorganization  dated as of
December  12, 2002 (the  "Amendment")  is entered into by and among MNB Holdings
Corporation ("Holding Company") and Mission National Bank ("Bank").


                                    RECITALS

         WHEREAS,  Holding  Company  and Bank have  entered  into  that  certain
Agreement  and  Plan of  Reorganization  dated  as of  December  12,  2002  (the
"Agreement")  providing for a corporate  reorganization  under which under which
the Bank would become the wholly-owned  subsidiary of Holding Company,  and each
existing  shareholder  of the Bank would  receive one share of Holdings  Company
common stock for each share of Bank common stock held.

         WHEREAS,  Holding  Company  and Bank each  agree that it is in the best
interests of the corporations to make certain amendments to the Agreement.

         NOW, THEREFORE,  for good and valuable  consideration,  the receipt and
sufficiency of which are hereby acknowledged,  Holding Company and Bank agree as
follows:

1.       The first  sentence of  paragraph  1.3 of the  Agreement  is amended to
         read:

         "By  virtue  of  the  Reorganization,  and  upon  consummation  of  the
         transactions   contemplated  by  this  Plan  of  Reorganization,   each
         outstanding  certificate  which previously  represented  shares of Bank
         Common Stock,  par value $5.00 per share,  (other than any shares as to
         which dissenters' rights have been perfected as provided in Section 2.3
         hereof),  shall, be converted into and exchanged for a right to receive
         one share of Holding Company common stock."

2.       The second  sentence of  paragraph  1.2 of the  Agreement is amended to
         read:

         "As of the Effective Date, each share of Bank common stock,  issued and
         outstanding  immediately  prior to lie  Effective  Date (other than any
         shares as to which  dissenters'  rights have been perfected as provided
         in Section  2.3  hereof)  shall,  by virtue of the  Reorganization  and
         without  any  action  on the  part of the  holder  thereof,  be,  until
         surrendered  for exchange,  be deemed for all purposes to evidence only
         the right to  receive  shares of no par value  Holding  Company  Common
         Stock in accordance with the terms of this Plan of Reorganization."

3.       The first  sentence of  paragraph  4.2 of the  Agreement  is amended to
         read:

         "The Bank is authorized to issue 4,000,00  shares of common stock,  par
         value  $5.00  per  share,  of which  452,773  shares  were  issued  and
         outstanding as of December 31, 2002."

                                       1


4.       Paragraph 5.4 is deleted in its entirety.

5.       Paragraph 7.5 is amended in its entirety to read:

         [Reserved]

6.       References.   Upon  execution  and  delivery  of  this  Amendment,  all
         references  in  the  Agreement  to  the  "Plan  of  Reorganization"  or
         "Agreement,"  and the provisions  thereof,  shall be deemed to refer to
         the Agreement, as amended by this Amendment.

7.       No other Amendments or Changes. Except as expressly amended or modified
         by this  Agreement,  all of the terms and  conditions  of the Agreement
         shall remain unchanged and in full force and effect.

8.       Definitions.  All  capitalized  terms  used  herein  and not  otherwise
         defined  or  amended  shall  have  the  meanings  given  to them in the
         Agreement.

IN WITNESS  WHEREOF,  the parties hereto have duly executed this Amendment as of
the day and year first above written.



MNB HOLDINGS CORPORATION               MISSION NATIONAL BANK


By: /s/ Owen J.Erickson                By: /s/ Owen J.Erickson
- ------------------------------             ------------------------------
Owen J.Erickson,                           Owen J.Erickson,
Chief Executive Officer                    Chief Executive Officer



Attest:                                Attest:

/s/ J. David Joves                     /s/ J. David Joves
- ------------------------------         ------------------------------
J. David Joves, Secretary              J. David Joves, Secretary