Exhibit 1.1

                               3,000,000 Shares

                            CELL THERAPEUTICS, INC.

                                 Common Stock

                            UNDERWRITING AGREEMENT
                            ----------------------

                                                         ________________ , 2000

CIBC World Markets Corp.
U.S. Bancorp Piper Jaffray
c/o CIBC World Markets Corp.
One World Financial Center
New York, New York  10281

On behalf of the several
Underwriters named on
Schedule I attached hereto.

Ladies and Gentlemen:

          Cell Therapeutics, Inc., a Washington corporation (the "Company"),
proposes, subject to the terms and conditions contained herein, to sell to you
and the other underwriters named on Schedule I to this Agreement (the
"Underwriters"), for whom you are acting as Representatives (the
"Representatives"), an aggregate of 3,000,000 shares (the "Firm Shares") of the
Company's Common Stock, no par value (the "Common Stock").  The respective
amounts of the Firm Shares to be purchased by each of the several Underwriters
are set forth opposite their names on Schedule I hereto. In addition, the
Company proposes to grant to the Underwriters an option to purchase up to an
additional 450,000 shares (the "Option Shares") of Common Stock from it for the
purpose of covering over-allotments in connection with the sale of the Firm
Shares.  The Firm Shares and the Option Shares are together called the "Shares."


            1.  Sale and Purchase of the Shares.
                -------------------------------

            On the basis of the representations, warranties and agreements
contained in, and subject to the terms and conditions of, this Agreement:

            (a) The Company agrees to sell to each of the Underwriters, and each
       of the Underwriters agrees, severally and not jointly, to purchase from
       the Company, at a price

                                      -1-


       of $_____ per share (the "Initial Price"), the number of Firm Shares set
       forth opposite the name of such Underwriter under the column "Number of
       Firm Shares to be Purchased from the Company" on Schedule I to this
       Agreement, subject to adjustment in accordance with Section 11 hereof.

            (b) The Company grants to the several Underwriters an option to
       purchase, severally and not jointly, all or any part of the Option Shares
       at the Initial Price.  The number of Option Shares to be purchased by
       each Underwriter shall be the same percentage (adjusted by the
       Representatives to eliminate fractions) of the total number of Option
       Shares to be purchased by the Underwriters as such Underwriter is
       purchasing of the Firm Shares.  Such option may be exercised only to
       cover over-allotments in the sales of the Firm Shares by the Underwriters
       and may be exercised in whole or in part at any time on or before 12:00
       noon, New York City time, on the business day before the Firm Shares
       Closing Date (as defined below), and from time to time thereafter within
       30 days after the date of this Agreement, in each case upon written,
       facsimile or telegraphic notice, or verbal or telephonic notice confirmed
       by written, facsimile or telegraphic notice, by the Representatives to
       the Company no later than 12:00 noon, New York City time, on the business
       day before the Firm Shares Closing Date or at least two business days
       before the Option Shares Closing Date (as defined below), as the case may
       be, setting forth the number of Option Shares to be purchased and the
       time and date (if other than the Firm Shares Closing Date) of such
       purchase.

            2. Delivery and Payment. Delivery by the Company of the Firm Shares
               --------------------
to the Representatives for the respective accounts of the Underwriters, and
payment of the purchase price by certified or official bank check or checks
payable in New York Clearing House (same day) funds drawn to the order of the
Company for the shares purchased from the Company, against delivery of the
respective certificates therefor to the Representatives, shall take place at the
offices of CIBC World Markets Corp., One World Financial Center, New York, New
York 10281, at 10:00 a.m., New York City time, on the third business day
following the date of this Agreement, or at such time on such other date, not
later than 10 business days after the date of this Agreement, as shall be agreed
upon by the Company and the Representatives (such time and date of delivery and
payment are called the "Firm Shares Closing Date").

            In the event the option with respect to the Option Shares is
exercised in whole or in part on one or more occasions, delivery by the Company
of the Option Shares to the Representatives for the respective accounts of the
Underwriters and payment of the purchase price thereof in immediately available
funds by wire transfer or by certified or official bank check or checks payable
in New York Clearing House (same day) funds to the Company shall take place at
the offices of CIBC World Markets Corp. specified above at the time and on the
date (which may be the same date as, but in no event shall be earlier than, the
Firm Shares Closing Date) specified in the notice referred to in Section 1(b)
(such time and date of delivery and payment are called the "Option Shares
Closing Date"). The Firm Shares Closing Date and the Option Shares Closing Date
are called, individually, a "Closing Date" and, together, the "Closing Dates."

                                      -2-


            Certificates evidencing the Shares shall be registered in such names
and shall be in such denominations as the Representatives shall request at least
two full business days before the Firm Shares Closing Date or, in the case of
Option Shares, on the day of notice of exercise of the option as described in
Section l(b) and shall be made available to the Representatives for checking and
packaging, at such place as is designated by the Representatives, on the full
business day before the Firm Shares Closing Date (or the Option Shares Closing
Date in the case of the Option Shares).

            3.  Registration Statement and Prospectus; Public Offering.  The
                ------------------------------------------------------
Company has prepared and filed in conformity with the requirements of the
Securities Act of 1933, as amended (the "Securities Act"), and the published
rules and regulations thereunder (the "Rules") adopted by the Securities and
Exchange Commission (the "Commission") a Registration Statement  (as hereinafter
defined) on Form S-3 (No. 333-_____), including a preliminary prospectus
relating to the Shares, and such amendments thereof as may have been required to
the date of this Agreement.  Copies of such Registration Statement (including
all amendments thereof) and of the related Preliminary Prospectus (as
hereinafter defined) have heretofore been delivered by the Company to you.  The
term "Preliminary Prospectus" means any preliminary prospectus (as described in
Rule 430 of the Rules) included at any time as a part of the Registration
Statement or filed with the Commission by the Company with the consent of the
Representatives pursuant to Rule 424(a) of the Rules. The term "Registration
Statement" as used in this Agreement means the initial registration statement
(including all exhibits, financial schedules and information deemed to be a part
of the Registration Statement through incorporation by reference or otherwise),
as amended at the time and on the date it becomes effective (the "Effective
Date") including the information (if any) deemed to be part thereof at the time
of effectiveness pursuant to Rule 430A of the Rules.  If the Company has filed
an abbreviated registration statement to register additional Shares pursuant to
Rule 462(b) under the Rules (the "462(b) Registration Statement")  then any
reference herein to the Registration Statement shall also be deemed to include
such 462(b) Registration Statement.  The term "Prospectus" as used in this
Agreement means the prospectus in the form included in the Registration
Statement at the time of effectiveness or, if Rule 430A of the Rules is relied
on, the term Prospectus shall also include the final prospectus filed with the
Commission pursuant to Rule 424(b) of the Rules.

            The Company understands that the Underwriters propose to make a
public offering of the Shares, as set forth in and pursuant to the Prospectus,
as soon after the Effective Date and the date of this Agreement as the
Representatives deem advisable. The Company hereby confirms that the
Underwriters and dealers have been authorized to distribute or cause to be
distributed each Preliminary Prospectus and are authorized to distribute the
Prospectus (as from time to time amended or supplemented if the Company
furnishes amendments or supplements thereto to the Underwriters).

            4. Representations and Warranties of the Company. The Company hereby
               ---------------------------------------------
represents and warrants to each Underwriter as follows:

            (a) On the Effective Date, the Registration Statement complied, and
       on the date of the Prospectus, the date any post-effective amendment to
       the Registration Statement becomes effective, the date any supplement or
       amendment to the Prospectus is filed with the Commission and each Closing
       Date, the Registration Statement and the Prospectus (and any amendment
       thereof or supplement thereto) will comply, in all material

                                      -3-


       respects, with the applicable provisions of the Securities Act and the
       Rules and the Securities Exchange Act of 1934, as amended (the "Exchange
       Act"), and the rules and regulations of the Commission thereunder. The
       Registration Statement did not, as of the Effective Date, contain any
       untrue statement of a material fact or omit to state any material fact
       required to be stated therein or necessary in order to make the
       statements therein not misleading; and on the Effective Date and the
       other dates referred to above neither the Registration Statement nor the
       Prospectus, nor any amendment thereof or supplement thereto, will contain
       any untrue statement of a material fact or will omit to state any
       material fact required to be stated therein or necessary in order to make
       the statements therein not misleading. When any related preliminary
       prospectus was first filed with the Commission (whether filed as part of
       the Registration Statement or any amendment thereto or pursuant to Rule
       424(a) of the Rules) and when any amendment thereof or supplement thereto
       was first filed with the Commission, such preliminary prospectus as
       amended or supplemented complied in all material respects with the
       applicable provisions of the Securities Act and the Rules and did not
       contain any untrue statement of a material fact or omit to state any
       material fact required to be stated therein or necessary in order to make
       the statements therein not misleading. Notwithstanding the foregoing,
       none of the representations and warranties in this paragraph 4(a) shall
       apply to statements in, or omissions from, the Registration Statement or
       the Prospectus made in reliance upon, and in conformity with, information
       herein or otherwise furnished in writing by the Representatives on behalf
       of the several Underwriters for use in the Registration Statement or the
       Prospectus. With respect to the preceding sentence, the Company
       acknowledges that the only information furnished in writing by the
       Representatives on behalf of the several Underwriters for use in the
       Registration Statement or the Prospectus is the paragraph with respect to
       stabilization on the inside front cover page of the Prospectus and the
       statements contained under the caption "Underwriting" in the Prospectus.

            (b) The Registration Statement is effective under the Securities Act
       and no stop order preventing or suspending the effectiveness of the
       Registration Statement or suspending or preventing the use of the
       Prospectus has been issued and no proceedings for that purpose have been
       instituted or are threatened under the Securities Act. Any required
       filing of the Prospectus and any supplement thereto pursuant to Rule
       424(b) of the Rules has been or will be made in the manner and within the
       time period required  by such Rule 424(b).

            (c) The documents incorporated by reference in the Registration
       Statement and the Prospectus, at the time they were filed with the
       Commission, complied in all material respects with the requirements of
       the Exchange Act and, when read together and with the other information
       in the Registration Statement and the Prospectus, do not contain an
       untrue statement of a material fact or omit to state a material fact
       required to be stated therein or necessary in order to make the
       statements therein, in the light of the circumstances under which they
       were made, not misleading.

            (d) The financial statements of the Company (including all notes and
       schedules thereto) included or incorporated by reference  in the
       Registration Statement and

                                      -4-


       Prospectus present fairly the financial position, the results of
       operations, the statements of cash flows and the statements of
       stockholders' equity and the other information purported to be shown
       therein of the Company at the respective dates and for the respective
       periods to which they apply; and such financial statements and related
       schedules and notes have been prepared in conformity with generally
       accepted accounting principles, consistently applied throughout the
       periods involved, and all adjustments necessary for a fair presentation
       of the results for such periods have been made. The summary and selected
       financial data included in the Prospectus present fairly the information
       shown therein as at the respective dates and for the respective periods
       specified and the summary and selected financial data have been presented
       on a basis consistent with the consolidated financial statements so set
       forth in the Prospectus and other financial information.

            (e) Ernst & Young LLP, whose reports are filed with the Commission
       as a part of the Registration Statement, are and, during the periods
       covered by their reports, were independent public accountants as required
       by the Securities Act and the Rules.

            (f) The Company and each of its Subsidiaries (as hereinafter
       defined) is a corporation duly organized, validly existing and in good
       standing under the laws of the State of the jurisdiction of its
       incorporation. The Company and each such subsidiary or other entity
       controlled directly or indirectly by the Company (collectively,
       "Subsidiaries") is duly qualified to do business and is in good standing
       as a foreign corporation in each jurisdiction in which the nature of the
       business conducted by it or location of the assets or properties owned,
       leased or licensed by it requires such qualification, except for such
       jurisdictions where the failure to so qualify would not have a material
       adverse effect on the assets or properties, business, results of
       operations or financial condition of the Company (a "Material Adverse
       Effect"). The Company does not own, lease or license any asset or
       property or conduct any business outside the United States of America.
       The Company and each of its Subsidiaries has all requisite corporate
       power and authority, and all necessary authorizations, approvals,
       consents, orders, licenses, certificates and permits of and from all
       governmental or regulatory bodies or any other person or entity
       (collectively, the "Permits"), to own, lease and license its assets and
       properties and conduct its business, all of which are valid and in full
       force and effect, as described in the Registration Statement and the
       Prospectus, except where the lack of such Permits, individually or in the
       aggregate, would not have a Material Adverse Effect. The Company and each
       of its Subsidiaries has fulfilled and performed in all material respects
       all of its material obligations with respect to such Permits and no event
       has occurred that allows, or after notice or lapse of time would allow,
       revocation or termination thereof or results in any other material
       impairment of the rights of the Company thereunder.  Except as may be
       required under the Securities Act and state and foreign Blue Sky laws, no
       other Permits are required  to enter into, deliver and perform this
       Agreement and to issue and sell the Shares.

                                      -5-


            (g) The Company and each of its Subsidiaries owns or possesses
       adequate and enforceable rights to use all patents, patent applications,
       trademarks, trademark applications, trade names, service marks,
       copyrights, copyright applications, licenses, know-how and other similar
       rights and proprietary knowledge (collectively, "Intangibles") described
       in the Prospectus as being owned by it necessary for the conduct of its
       business.  Neither the Company nor any of its Subsidiaries has received
       any notice of, or is not aware of, any infringement of or conflict with
       asserted rights of others with respect to any Intangibles.

            (h) The Company and each of its Subsidiaries has good and marketable
       title in fee simple to all items of real property and good and marketable
       title to all personal property described in the Prospectus as being owned
       by it. Any real property and buildings described in the Prospectus as
       being held under lease by the Company and each of its Subsidiaries is
       held by it under valid, existing and enforceable leases, free and clear
       of all liens, encumbrances, claims, security interests and defects,
       except such as are described in the Registration Statement and the
       Prospectus or would not have a Material Adverse Effect.

            (i) There are no litigation or governmental proceedings to which the
       Company or its Subsidiaries is subject or which is pending or, to the
       knowledge of the Company, threatened, against the Company or any of its
       Subsidiaries, which, individually or in the aggregate, might have a
       Material Adverse Effect, affect the consummation of this Agreement or
       which is required to be disclosed in the Registration Statement and the
       Prospectus that is not so disclosed.

            (j) Subsequent to the respective dates as of which information is
       given in the Registration Statement and the Prospectus, except as
       described therein,  (a) there has not been any material adverse change
       with regard to the assets or properties, business, results of operations
       or financial condition of the Company; (b) neither the Company nor its
       Subsidiaries has sustained any loss or interference with its assets,
       businesses or properties (whether owned or leased) from fire, explosion,
       earthquake, flood or other calamity, whether or not covered by insurance,
       or from any labor dispute or any court or legislative or other
       governmental action, order or decree which would have a Material Adverse
       Effect; and (c) since the date of the latest balance sheet included in
       the Registration Statement and the Prospectus, except as reflected
       therein, neither the Company nor its Subsidiaries has (i) issued any
       securities or incurred any liability or obligation, direct or contingent,
       for borrowed money, except such liabilities or obligations incurred in
       the ordinary course of business, (ii) entered into any transaction not in
       the ordinary course of business or (iii) declared or paid any dividend or
       made any distribution on any shares of its stock or redeemed, purchased
       or otherwise acquired or agreed to redeem, purchase or otherwise acquire
       any shares of its stock.

            (k) There is no document, contract or other agreement of a character
       required to be described in the Registration Statement or Prospectus or
       to be filed as an exhibit to the Registration Statement which is not
       described or filed as required by the Securities Act

                                      -6-


       or Rules. Each description of a contract, document or other agreement in
       the Registration Statement and the Prospectus accurately reflects in all
       respects the terms of the underlying document, contract or agreement.
       Each agreement described in the Registration Statement and Prospectus or
       listed in the Exhibits to the Registration Statement or incorporated by
       reference is in full force and effect and is valid and enforceable by and
       against the Company or the Subsidiary, as the case may be, in accordance
       with its terms. Neither the Company nor the Subsidiary, if the Subsidiary
       is a party, nor to the Company's knowledge, any other party is in default
       in the observance or performance of any term or obligation to be
       performed by it under any such agreement, and no event has occurred which
       with notice or lapse of time or both would constitute such a default, in
       any such case which default or event, individually or in the aggregate,
       would have a Material Adverse Effect. No default exists, and no event has
       occurred which with notice or lapse of time or both would constitute a
       default, in the due performance and observance of any term, covenant or
       condition, by the Company or the Subsidiary, if the Subsidiary is a party
       thereto, of any other agreement or instrument to which the Company or the
       Subsidiary is a party or by which the Company, the Subsidiary or their
       properties or business may be bound or affected which default or event,
       individually or in the aggregate, would have a Material Adverse Effect.

            (l) Neither the Company nor any of its Subsidiaries is in violation
       of any term or provision of its charter or by-laws or of any franchise,
       license, permit, judgment, decree, order, statute, rule or regulation,
       where the consequences of such violation, individually or in the
       aggregate, would have a Material Adverse Effect.

            (m) Neither the execution, delivery and performance of this
       Agreement by the Company nor the consummation of any of the transactions
       contemplated hereby (including, without limitation, the issuance and sale
       by the Company of the Shares  will give rise to a right to terminate or
       accelerate the due date of any payment due under, or conflict with or
       result in the breach of any term or provision of, or constitute a default
       (or an event which with notice or lapse of time or both would constitute
       a default) under, or require any consent or waiver under, or result in
       the execution or imposition of any lien, charge or encumbrance upon any
       properties or assets of the Company or its Subsidiary pursuant to the
       terms of, any indenture, mortgage, deed of trust or other agreement or
       instrument to which the Company or its Subsidiary is a party or by which
       either the Company or its Subsidiary or any of their properties or
       businesses is bound, or any franchise, license, permit, judgment, decree,
       order, statute, rule or regulation applicable to the Company or its
       Subsidiary or violate any provision of the charter or by-laws of the
       Company or its Subsidiary, except for such consents or waivers which have
       already been obtained and are in full force and effect.

            (n) The Company has authorized and outstanding capital stock as set
       forth under the caption "Capitalization" in the Prospectus.   The
       certificates evidencing the Shares are in due and proper legal form and
       have been duly authorized for issuance by the Company.  All of the issued
       and outstanding shares of Common Stock have been duly and validly issued
       and are fully paid and nonassessable.  There are no statutory preemptive
       or

                                      -7-


       other similar rights to subscribe for or to purchase or acquire any
       shares of Common Stock of the Company or its Subsidiaries or any such
       rights pursuant to its Certificate of Incorporation or by-laws or any
       agreement or instrument to or by which the Company or any of its
       Subsidiaries is a party or bound. The Shares, when issued and sold
       pursuant to this Agreement, will be duly and validly issued, fully paid
       and nonassessable and none of them will be issued in violation of any
       preemptive or other similar right. Except as disclosed in the
       Registration Statement and the Prospectus, there is no outstanding
       option, warrant or other right calling for the issuance of, and there is
       no commitment, plan or arrangement to issue, any share of stock of the
       Company or its Subsidiaries or any security convertible into, or
       exercisable or exchangeable for, such stock. The Common Stock and the
       Shares conform in all material respects to all statements in relation
       thereto contained in the Registration Statement and the Prospectus. All
       outstanding shares of capital stock of each Subsidiary have been duly
       authorized and validly issued, and are fully paid and nonassessable and
       are owned directly by the Company or by another wholly-owned subsidiary
       of the Company free and clear of any security interests, liens,
       encumbrances, equities or claims, other than those described in the
       Prospectus.

            (o) No holder of any security of the Company has the right to have
       any security owned by such holder included in the Registration Statement
       or to demand registration of any security owned by such holder during the
       period ending 90 days after the date of this Agreement.  Each five
       percent  (or greater) stockholder, director and executive officer of the
       Company has delivered to the Representatives his enforceable written
       lock-up agreement in the form attached to this Agreement ("Lock-Up
       Agreement").

            (p) All necessary corporate action has been duly and validly taken
       by the Company and the Parent to authorize the execution, delivery and
       performance of this Agreement and the issuance and sale of the Shares by
       the Company.  This Agreement has been duly and validly authorized,
       executed and delivered by the Company and constitutes and will constitute
       the legal, valid and binding obligations of the Company enforceable
       against the Company in accordance with its terms, except as the
       enforceability thereof may be limited by bankruptcy, insolvency,
       reorganization, moratorium or other similar laws affecting the
       enforcement of creditors' rights generally and by general equitable
       principles.

            (q) Neither the Company nor any of its Subsidiaries is involved in
       any labor dispute nor, to the knowledge of the Company, is any such
       dispute threatened, which dispute would have a Material Adverse Effect.
       The Company is not aware of any existing or imminent labor disturbance by
       the employees of any of its principal suppliers or contractors which
       would have a Material Adverse Effect. The Company is not aware of any
       threatened or pending litigation between the Company or its Subsidiaries
       and any of its executive officers which, if adversely determined, could
       have a Material Adverse Effect and has no reason to believe that such
       officers will not remain in the employment of the Company.

                                      -8-


            (r) No transaction has occurred between or among the Company and any
       of its officers or directors or five percent shareholders or any
       affiliate or affiliates of any such officer or director or five percent
       shareholders that is required to be described in and is not described in
       the Registration Statement and the Prospectus.

            (s) The Company has not taken, nor will it take, directly or
       indirectly, any action designed to or which might reasonably be expected
       to cause or result in, or which has constituted or which might reasonably
       be expected to constitute, the stabilization or manipulation of the price
       of the Common Stock to facilitate the sale or resale of any of the
       Shares.

            (t) The Company and its Subsidiaries have filed all Federal, state,
       local and foreign tax returns which are required to be filed through the
       date hereof, or has received extensions thereof, and has paid all taxes
       shown on such returns and all assessments received by it to the extent
       that the same are material and have become due. There are no tax audits
       or investigations pending, which if adversely determined would have a
       Material Adverse Effect; nor are there any material proposed additional
       tax assessments against the Company or any of its Subsidiaries.

            (u) The Shares have been duly authorized for quotation on the
       National Association of Securities Dealers Automated Quotation ("Nasdaq")
       National Market System, subject to official Notice of Issuance. A
       registration statement has been filed on Form 8-A pursuant to Section 12
       of the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
       which registration statement complies in all material respects with the
       Exchange Act.

            (v) The Company has complied with all of the requirements and filed
       the required forms as specified in Florida Statutes Section 517.075.

            (w) The books, records and accounts of the Company and its
       Subsidiaries accurately and fairly reflect, in reasonable detail, the
       transactions in, and dispositions of, the assets of, and the results of
       operations of, the Company and its Subsidiaries.  The Company and each of
       its Subsidiaries maintains a system of internal accounting controls
       sufficient to provide reasonable assurances that (i) transactions are
       executed in accordance with management's general or specific
       authorizations, (ii) transactions are recorded as necessary to permit
       preparation of financial statements in accordance with generally accepted
       accounting principles and to maintain asset accountability, (iii) access
       to assets is permitted only in accordance with management's general or
       specific authorization and (iv) the recorded accountability for assets is
       compared with the existing assets at reasonable intervals and appropriate
       action is taken with respect to any differences.

            (x) The Company and its Subsidiaries are insured by insurers of
       recognized financial responsibility against such losses and risks and in
       such amounts as are customary in the businesses in which they are engaged
       or propose to engage after giving effect to the transactions described in
       the Prospectus; all policies of insurance and fidelity or surety

                                      -9-


       bonds insuring the Company or any of its subsidiaries or the Company's or
       its subsidiaries' respective businesses, assets, employees, officers and
       directors are in full force and effect; the Company and each of its
       subsidiaries are in compliance with the terms of such policies and
       instruments in all material respects; and neither the Company nor any
       Subsidiary of the Company has any reason to believe that it will not be
       able to renew its existing insurance coverage as and when such coverage
       expires or to obtain similar coverage from similar insurers as may be
       necessary to continue its business at a cost that would not have a
       Material Adverse Effect. Neither the Company nor any Subsidiary has been
       denied any insurance coverage which it has sought or for which it has
       applied.

            (y) Each approval, consent, order, authorization, designation,
       declaration or filing of, by or with any regulatory, administrative or
       other governmental body necessary in connection with the execution and
       delivery by the Company of this Agreement and the consummation of the
       transactions herein contemplated required to be obtained or performed by
       the Company (except such additional steps as may be required by the
       National Association of Securities Dealers, Inc. (the "NASD") or may be
       necessary to qualify the Shares for public offering by the Underwriters
       under the state securities or Blue Sky laws) has been obtained or made
       and is in full force and effect.

            (z) There are no affiliations with the NASD among the Company's
       officers, directors or, to the best of the knowledge of the Company, any
       five percent or greater stockholder of the Company, except as set forth
       in the Registration Statement or otherwise disclosed in writing to the
       Representatives.

            (aa) (i) Each of the Company and its Subsidiaries is in compliance
       in all material respects with all rules, laws and regulation relating to
       the use, treatment, storage and disposal of toxic substances and
       protection of health or the environment ("Environmental Law") which are
       applicable to its business; (ii) neither the Company nor its Subsidiaries
       has received any notice from any governmental authority or third party of
       an asserted claim under Environmental Laws; (iii) each of the Company and
       its Subsidiaries has received all permits, licenses or other approvals
       required of it under applicable Environmental Laws to conduct its
       business and is in compliance with all terms and conditions of any such
       permit, license or approval; (iv) to the Company's knowledge, no facts
       currently exist that will require the Company or its Subsidiaries to make
       future material capital expenditures to comply with Environmental Laws;
       and (v) no property which is or has been owned, leased or occupied by the
       Company or its Subsidiaries has been designated as a Superfund site
       pursuant to the Comprehensive Environmental Response, Compensation of
       Liability Act of 1980, as amended (42 U.S.C. Section 9601, et. seq.) or
       otherwise designated as a contaminated site under applicable state or
       local law. Neither the Company nor any of its Subsidiaries has been named
       as a "potentially responsible party" under the CER, CLA 1980.

            (bb) In the ordinary course of its business, the Company
       periodically reviews the effect of Environmental Laws on the business,
       operations and properties of the Company and its subsidiaries, in the
       course of which the Company identifies and evaluates

                                      -10-


       associated costs and liabilities (including, without limitation, any
       capital or operating expenditures required for clean-up, closure of
       properties or compliance with Environmental Laws, or any permit, license
       or approval, any related constraints on operating activities and any
       potential liabilities to third parties). On the basis of such review, the
       Company has reasonably concluded that such associated costs and
       liabilities would not, singly or in the aggregate, have a Material
       Adverse Effect.

            (cc) The Company is not and, after giving effect to the offering and
       sale of the Shares and the application of proceeds thereof as described
       in the Prospectus, will not be an "investment company" within the meaning
       of the Investment Company Act of 1940, as amended (the "Investment
       Company Act").

            (dd) None of the Company, its Subsidiaries or any other person
       associated with or acting on behalf of the Company or its Subsidiaries,
       including, without limitation, any director, officer, agent or employee
       of the Company or its Subsidiaries has, directly or indirectly, while
       acting on behalf of the Company or its Subsidiaries (i) used any
       corporate funds for unlawful contributions, gifts, entertainment or other
       unlawful expenses relating to political activity; (ii) made any unlawful
       payment to foreign or domestic government officials or employees or to
       foreign or domestic political parties or campaigns from corporate funds;
       (iii) violated any provision of the Foreign Corrupt Practices Act of
       1977, as amended; or (iv) made any other unlawful payment.

            (ee) The Company has reviewed its operations and that of its
       Subsidiaries to evaluate the extent to which the business or operations
       of the Company or any of its Subsidiaries have been or will be affected
       by the Year 2000 Problem (that is, any significant risk that computer
       hardware or software applications used by the Company and its
       subsidiaries will not, in the case of dates or time periods occurring
       after December 31, 1999, function at least as effectively as in the case
       of dates or time periods occurring prior to January 1, 2000); as a result
       of such review, (i) the Company has no reason to believe, and does not
       believe, that (A) there are any issues related to the Year 2000 Problem
       that are of a character required to be described or referred to in the
       Registration Statement or Prospectus which have not been accurately
       described in the Registration Statement or Prospectus and (B) the Year
       2000 Problem has had or will have a Material Adverse Effect, or has
       resulted or will result in any material loss or interference with the
       business or operations of the Company and its Subsidiaries, taken as a
       whole; (ii) the Company reasonably believes, after due inquiry, that the
       suppliers, vendors, customers or other material third parties used or
       served by the Company and such Subsidiaries have addressed the Year 2000
       Problem prior to December 31, 1999, except to the extent that a failure
       to address the Year 2000 by a supplier, vendor, customer or material
       third party would not have a Material Adverse Effect; and (iii) the
       Company has not expended and does not anticipate expending funds in the
       aggregate in excess of $________ as a result of or related to the
       evaluation and remediation of any Year 2000 Problems.

            (ff) The Company and each of its Subsidiaries maintain a system of
       internal accounting controls sufficient to provide reasonable assurance
       that (1) transactions are

                                      -11-


       executed in accordance with management's general or specific
       authorizations; (2) transactions are recorded as necessary to permit
       preparation of financial statements in conformity with generally accepted
       accounting principles and to maintain asset accountability; (3) access to
       assets is permitted only in accordance with management's general or
       specific authorization; and (4) the recorded accountability for assets is
       compared with the existing assets at reasonable intervals and appropriate
       action is taken with respect to any differences.

            (gg) The Company and each of its Subsidiaries is in compliance in
       all material respects with all rules, laws and regulations relating to
       the development, testing, manufacturing, sale and distribution of
       pharmaceuticals and other products regulated by the United States Food
       and Drug Administration, or similar state or foreign governmental
       agencies.

            5.  Conditions of the Underwriters' Obligations.  The obligations of
                -------------------------------------------
the Underwriters under this Agreement are several and not joint.  The respective
obligations of the Underwriters to purchase the Shares are subject to each of
the following terms and conditions:

            (a) Notification that the Registration Statement has become
       effective shall have been received by the Representatives and the
       Prospectus shall have been timely filed with the Commission in accordance
       with Section 6(a) of this Agreement.

            (b) No order preventing or suspending the use of any preliminary
       prospectus or the Prospectus shall have been or shall be in effect and no
       order suspending the effectiveness of the Registration Statement shall be
       in effect and no proceedings for such purpose shall be pending before or
       threatened by the Commission, and any requests for additional information
       on the part of the Commission (to be included in the Registration
       Statement or the Prospectus or otherwise) shall have been complied with
       to the satisfaction of the Commission and the Representatives.

            (c) The representations and warranties of the Company contained in
       this Agreement and in the certificates delivered pursuant to Section 5(d)
       shall be true and correct when made and on and as of each Closing Date as
       if made on such date. The Company shall have performed all covenants and
       agreements and satisfied all the conditions contained in this Agreement
       required to be performed or satisfied by them at or before such Closing
       Date.

                                      -12-


            (d) The Representatives shall have received on each Closing Date a
       certificate, addressed to the Representatives and dated such Closing
       Date, of the chief executive or chief operating officer and the chief
       financial officer or chief accounting officer of the Company to the
       effect that (i) the signers of such certificate have carefully examined
       the Registration Statement, the Prospectus and this Agreement and that
       the representations and warranties of the Company in this Agreement are
       true and correct on and as of such Closing Date with the same effect as
       if made on such Closing Date and the Company has performed all covenants
       and agreements and satisfied all conditions contained in this Agreement
       required to be performed or satisfied by it at or prior to such Closing
       Date, and (ii) no stop order suspending the effectiveness of the
       Registration Statement has been issued and to the best of their
       knowledge, no proceedings for that purpose have been instituted or are
       pending under the Securities Act.

            (e) The Representatives shall have received, at the time this
       Agreement is executed and on each Closing Date a signed letter from Ernst
       & Young LLP addressed to the Representatives and dated, respectively, the
       date of this Agreement and each such Closing Date, in form and substance
       reasonably satisfactory to the Representatives, confirming that they are
       independent accountants within the meaning of the Securities Act and the
       Rules, that the response to Item 10 of the Registration Statement is
       correct insofar as it relates to them and stating in effect that:

                 (i)  in their opinion the audited financial statements and
            financial statement schedules included or incorporated by reference
            in the Registration Statement and the Prospectus and reported on by
            them comply as to form in all material respects with the applicable
            accounting requirements of the Securities Act and the Rules;

                 (ii)  on the basis of a reading of the amounts included in the
            Registration Statement and the Prospectus under the headings
            "Summary Consolidated Financial Data" and "Selected Consolidated
            Financial Data," carrying out certain procedures (but not an
            examination in accordance with generally accepted auditing
            standards) which would not necessarily reveal matters of
            significance with respect to the comments set forth in such letter,
            a reading of the minutes of the meetings of the stockholders and
            directors of the Company, and inquiries of certain officials of the
            Company who have responsibility for financial and accounting matters
            of the Company as to transactions and events subsequent to the date
            of the latest audited financial statements, except as disclosed in
            the Registration Statement and the Prospectus, nothing came to their
            attention which caused them to believe that:

                      (A)  the amounts in "Summary Consolidated Financial Data,"
                 and "Selected Consolidated Financial Data" included in the
                 Registration Statement and the Prospectus do not agree with the
                 corresponding amounts in the audited and unaudited financial
                 statements from which such amounts were derived; or

                                      -13-


                      (B)  with respect to the Company, there were, at a
                 specified date not more than three business days prior to the
                 date of the letter, any increases in the current liabilities
                 and long-term liabilities of the Company or any decreases in
                 net income or in working capital or the stockholders' equity in
                 the Company, as compared with the amounts shown on the
                 Company's audited balance sheet for the fiscal year ended
                 December 31, 1999 and the ____ months ended ____________
                 included in the Registration Statement;

                 (iii) they have performed certain other procedures as may be
            permitted under Generally Acceptable Auditing Standards as a result
            of which they determined that certain information of an accounting,
            financial or statistical nature (which is limited to accounting,
            financial or statistical information derived from the general
            accounting records of the Company) set forth in the Registration
            Statement and the Prospectus and reasonably specified by the
            Representatives agrees with the accounting records of the Company;
            and

                 (iv) based upon the procedures set forth in clauses (ii) and
            (iii) above and a reading of the amounts included in the
            Registration Statement under the headings "Summary Consolidated
            Financial Data" and "Selected Consolidated Financial Data" included
            in the Registration Statement and Prospectus and a reading of the
            financial statements from which certain of such data were derived,
            nothing has come to their attention that gives them reason to
            believe that the "Summary Consolidated Financial Data" and "Selected
            Consolidated Financial Data" included in the Registration Statement
            and Prospectus do not comply as to the form in all material respects
            with the applicable accounting requirements of the Securities Act
            and the Rules or that the information set forth therein is not
            fairly stated in relation to the financial statements included in
            the Registration Statement or Prospectus from which certain of such
            data were derived are not in conformity with generally accepted
            accounting principles applied on a basis substantially consistent
            with that of the audited financial statements included in the
            Registration Statement and Prospectus.

                 References to the Registration Statement and the Prospectus in
            this paragraph (e) are to such documents as amended and supplemented
            at the date of the letter.

            (f) The Representatives shall have received on each Closing Date
       from Wilson Sonsini Goodrich & Rosati, Professional Corporation, counsel
       for the Company, an opinion, addressed to the Representatives and dated
       such Closing Date, and stating in effect that:

                 (i)  Each of  the Company and its Subsidiaries has been duly
            organized and is validly existing as a corporation in good standing
            under the laws of the State of Washington.  Each of  the Company and
            its Subsidiaries is duly qualified and in

                                      -14-


            good standing as a foreign corporation in each jurisdiction in which
            the character or location of its assets or properties (owned, leased
            or licensed) or the nature of its businesses makes such
            qualification necessary, except for such jurisdictions where the
            failure to so qualify, individually or in the aggregate, would not
            have a Material Adverse Effect.

                 (ii) Each of the Company and its Subsidiaries has all requisite
            corporate power and authority to own, lease and license its assets
            and properties and conduct its business as now being conducted and
            as described in the Registration Statement and the Prospectus and,
            with respect to the Company, to enter into, deliver and perform this
            Agreement and to issue and sell the Shares other than those required
            under the state and foreign Blue Sky laws.

                 (iii)    The Company has authorized and issued capital stock as
            set forth in the Registration Statement and the Prospectus under the
            caption "Capitalization"; the certificates evidencing the Shares are
            in due and proper legal form and have been duly authorized for
            issuance by the Company; all of the outstanding shares of Common
            Stock of the Company have been duly and validly authorized and
            issued and are fully paid and nonassessable and none of them was
            issued in violation of any preemptive or other similar right. The
            Shares when issued and sold pursuant to this Agreement, will be duly
            and validly issued, outstanding, fully paid and nonassessable and
            none of them will have been issued in violation of any preemptive or
            other similar right.   To the best of such counsel's knowledge,
            except as disclosed in the Registration Statement and the
            Prospectus, there are no preemptive or other rights to subscribe for
            or to purchase or any restriction upon the voting or transfer of any
            securities of the Company pursuant to the Company's Certificate of
            Incorporation or by-laws or other governing documents or any
            agreements or other instruments to which the Company is a party or
            by which it is bound. To the best of such counsel's knowledge,
            except as disclosed in the Registration Statement and the
            Prospectus, there is no outstanding option, warrant or other right
            calling for the issuance of, and no commitment, plan or arrangement
            to issue, any share of stock of the Company or any security
            convertible into, exercisable for, or exchangeable for stock of the
            Company.  The Common Stock, the Shares and the Warrants conform in
            all material respects to the descriptions thereof contained in the
            Registration Statement and the Prospectus. The issued and
            outstanding shares of capital stock of each of the Company's
            Subsidiaries have been duly authorized and validly issued, are fully
            paid and nonassessable and are owned by the Company or by another
            wholly-owned subsidiary of the Company, free and clear of any
            perfected security interest or, to the knowledge of such counsel,
            any other security interests, liens, encumbrances, equities or
            claims, other than those contained in the Registration Statement and
            the Prospectus.

                 (iv) Each of the Lock-Up Agreements executed by  the Company's
            stockholders, directors and officers  has been duly and validly
            delivered by such persons and constitutes the legal, valid and
            binding obligation of each such person

                                      -15-


            enforceable against each such person in accordance with its terms,
            except as the enforceability thereof may be limited by applicable
            bankruptcy, insolvency, reorganization, moratorium or other similar
            laws affecting the enforcement of creditors' rights generally and by
            general equitable principles.

                 (v)   All necessary corporate action has been duly and validly
            taken by the Company to authorize the execution, delivery and
            performance of this Agreement and the issuance and sale of the
            Shares.  This Agreement has been duly and validly authorized,
            executed and delivered by the Company and this Agreement constitutes
            the legal, valid and binding obligation of the Company enforceable
            against the Company in accordance with their respective terms except
            as such enforceability may be limited by applicable bankruptcy,
            insolvency, fraudulent conveyance, reorganization, moratorium and
            other similar laws affecting the enforcement of creditors' rights
            generally and by general equitable principles.

                 (vi)   Neither the execution, delivery and performance of this
            Agreement by the Company nor the consummation of any of the
            transactions contemplated hereby (including, without limitation, the
            issuance and sale by the Company of the Shares will give rise to a
            right to terminate or accelerate the due date of any payment due
            under, or conflict with or result in the breach of any term or
            provision of, or constitute a default (or any event which with
            notice or lapse of time, or both, would constitute a default) under,
            or require consent or waiver under, or result in the execution or
            imposition of any lien, charge, claim, security interest or
            encumbrance upon any properties or assets of the Company or any
            Subsidiary pursuant to the terms of any indenture, mortgage, deed
            trust, note or other agreement or instrument of which such counsel
            is aware and to which the Company or any Subsidiary is a party or by
            which it either the Company or any Subsidiary or any of its
            properties or businesses is bound, or any franchise, license,
            permit, judgment, decree, order, statute, rule or regulation of
            which such counsel is aware or violate any provision of the charter
            or by-laws of the Company or any Subsidiary.

                 (vii)    To the best of such counsel's knowledge, no default
            exists, and no event has occurred which with notice or lapse of
            time, or both, would constitute a default, in the due performance
            and observance of any term, covenant or condition by the Company of
            any indenture, mortgage, deed of trust, note or any other agreement
            or instrument to which the Company is a party or by which it or any
            of its assets or properties or businesses may be bound or affected,
            where the consequences of such default, individually or in the
            aggregate, would have a Material Adverse Effect.

                 (viii)    To the best of such counsel's knowledge, the Company
            and its Subsidiaries are not in violation of any term or provision
            of its charter or by-laws or any franchise, license, permit,
            judgment, decree, order, statute, rule or

                                      -16-


            regulation, where the consequences of such violation, individually
            or in the aggregate, would have a Material Adverse Effect.

                 (ix)   No consent, approval, authorization or order of any
            court or governmental agency or regulatory body is required for the
            execution, delivery or performance of this Agreement by the Company
            or the consummation of the transactions contemplated hereby or
            thereby, except such as have been obtained under the Securities Act
            and such as may be required under state securities or Blue Sky laws
            in connection with the purchase and distribution of the Shares by
            the several Underwriters.

                 (x)   To the best of such counsel's knowledge, there is no
            litigation or governmental or other proceeding or investigation,
            before any court or before or by any public body or board pending or
            threatened against, or involving the assets, properties or
            businesses of, the Company which would have a Material Adverse
            Effect.

                 (xi) The statements in the Prospectus under the captions
            "Description of Capital Stock" and "Liquidity and Capital Resources"
            and "Business-
            __________,""________________________________,""____________________
            _________," and "__________________," insofar as such statements
            constitute a summary of documents referred to therein or matters of
            law, are fair summaries in all material respects and accurately
            present the information called for with respect to such documents
            and matters.  Accurate copies of all contracts and other documents
            required to be filed as exhibits to, or described in, the
            Registration Statement have been so filed with the Commission or are
            fairly described in the Registration Statement, as the case may be.

                 (xii)  The Registration Statement, all preliminary prospectuses
            and the Prospectus and each amendment or supplement thereto (except
            for the financial statements and schedules and other financial and
            statistical data included therein, as to which such counsel
            expresses no opinion) comply as to form in all material respects
            with the requirements of the Securities Act and the Rules.

                 (xiii)    The Registration Statement is effective under the
            Securities Act, and no stop order suspending the effectiveness of
            the Registration Statement has been issued and no proceedings for
            that purpose have been instituted or are threatened, pending or
            contemplated.  Any required filing of the Prospectus and any
            supplement thereto pursuant to Rule 424(b) under the Securities Act
            has been made in the manner and within the time period required by
            such Rule 424(b).

                 (xiv)    The Shares have been approved for listing on the
            Nasdaq National Market System.

                                      -17-


                 (xv) The capital stock of the Company conforms in all material
            respects to the description thereof contained in the Prospectus
            under the caption "Description of Capital Stock."

                 (xvi) The Company is not an "investment company" or an entity
            controlled by an "investment company" as such terms are defined in
            the Investment Company Act of 1940, as amended.

          To the extent deemed advisable by such counsel, they may rely as to
matters of fact on certificates of responsible officers of the Company and
public officials and on the opinions of other counsel satisfactory to the
Representatives as to matters which are governed by laws other than the laws of
the State of New York, the General Corporation Law of the State of Washington
and the Federal laws of the United States; provided that such counsel shall
state that in their opinion the Underwriters and they are justified in relying
on such other opinions.  Copies of such certificates and other opinions shall be
furnished to the Representatives and counsel for the Underwriters.

          In addition, such counsel shall state that such counsel has
participated in conferences with officers and other representatives of the
Company, representatives of the Representatives and representatives of the
independent certified public accountants of the Company, at which conferences
the contents of the Registration Statement and the Prospectus and related
matters were discussed and, although such counsel is not passing upon and does
not assume any responsibility for the accuracy, completeness or fairness of the
statements contained in the Registration Statement and the Prospectus (except as
specified in the foregoing opinion), on the basis of the foregoing, no facts
have come to the attention of such counsel which lead such counsel to believe
that the Registration Statement at the time it became effective (except with
respect to the financial statements and notes and schedules thereto and other
financial data, as to which such counsel need express no belief) contained any
untrue statement of a material fact or omitted to state a material fact required
to be stated therein or necessary to make the statements therein not misleading,
or that the Prospectus as amended or supplemented (except with respect to the
financial statements, notes and schedules thereto and other financial data, as
to which such counsel need make no statement) on the date thereof contained any
untrue statement of a material fact or omitted to state a material fact
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

            (g) The Representatives shall have received on each Closing Date
     from ___________________________, special patent counsel for the Company,
     an opinion, addressed to the Representatives and dated such Closing Date,
     and stating in effect that:

     We have acted as patent counsel to the Company with respect to the patent
     matters reflected on Schedule A attached hereto (the "Relevant Patent
     Matters").

     We have read the Registration Statement and the Prospectus, including in
     particular the portions of the Registration Statement and the Prospectus
     under the captions ___________ ____________________
     ___________________________ (such portions being referred to herein,
     collectively, as the "Technology Portions").

                                      -18-


     OPINIONS:

     i.   The statements in the Technology Portions are accurate and fairly
          present the matters of law and legal conclusions stated therein.

     ii.  Nothing has come to our attention which has caused us to believe that
          the Technology Portions contain any untrue statement of a material
          fact with respect to the patent position of the Company, or omit to
          state any material fact relating to the patent position of the
          Company.

     iii. Nothing has come to our attention which has caused us to believe that
          (a) any patent application referred to in the Relevant Patent Matters
          was not properly prepared and filed, in accordance with all applicable
          legal and procedural requirements, or is not in good standing, (b) the
          issued patents (the "Issued Patents") referred to in the Relevant
          Patent Matters was not properly obtained, in accordance with all
          applicable legal and procedural requirements, or is not in good
          standing, (c) that any invention described in any patent application
          or the issued patent is not held by the Company, or (d) any relevant
          prior art has not been disclosed promptly to the appropriate
          governmental agency.

     iv.  To our knowledge, the Company has not received any notice asserting
          any ownership rights contrary to those of the Company in any of the
          Relevant Patent Matters.

     v.   To our knowledge, the Company has not received any notice challenging
          the validity or enforceability of any Relevant Patent Matter.

     vi.  To our knowledge, the Company has not received any notice of
          infringement of, or conflict with, rights or claims of others with
          respect to any patent, trademark, service mark, trade name, copyright
          or know-how.

     vii. To our knowledge, other than proceedings (except re-examination,
          reissue or interference proceedings) of the various patent and
          trademark offices, there are no legal or governmental proceedings
          pending relating to any patent, patent application, trade secret,
          trademark, service mark or other proprietary information or materials
          of the Company and, to our knowledge, no such proceedings are
          threatened or contemplated by governmental authorities or others.

          In addition, such counsel shall state that such counsel has
participated in conferences with officers and other representatives of the
Company, representatives of the Representatives and representatives of the
independent public accountants of the Company, at which conferences the contents
of the Registration Statement and the Prospectus as they related to the matters
set forth in the foregoing opinion were discussed. While such counsel has not
undertaken to independently verify and does not assume any responsibility for
the accuracy, completeness or fairness of the statements contained in the
Registration Statement and the Prospectus (except as specified in the foregoing
opinion), on the basis of the foregoing, no facts have come to the attention of
such counsel with

                                      -19-


respect to the matters set forth in the foregoing opinion which lead such
counsel to believe that the Registration Statement at the time it became
effective (except with respect to the financial statements and notes and
schedules thereto and other financial data, as to which such counsel need
express no belief) contained any untrue statement of a material fact or omitted
to state a material fact required to be stated therein or necessary to make the
statements therein not misleading, or that the Prospectus as amended or
supplemented (except with respect to the financial statements, notes and
schedules thereto and other financial data, as to which such counsel need make
no statement) on the date thereof and the date of such opinion contained any
untrue statement of a material fact or omitted to state a material fact
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

            (h) The Representatives shall have received on each Closing Date
     from ___________________________, special regulatory counsel for the
     Company, an opinion, addressed to the Representatives and dated such
     Closing Date, and stating in effect that:

               (i) The statements under the captions _____________  __________
     ___________________  and _______________ in the Registration Statement and
     the Prospectus are in all material respects accurate summaries of
     applicable U.S. federal law and regulation under the Federal Food, Drug and
     Cosmetic Act, as amended, as applied by the U.S. Food and Drug
     Administration, subject to the qualifications set forth therein.

               (ii) No facts have come to our attention that have caused us to
     believe that the information contained under the captions _____________
     __________________  ___________________ and ________________ (a) in the
     Registration Statement at the time the Registration Statement became
     effective contained any untrue statement of a material fact, or omitted to
     state any material fact required to be stated therein or necessary in order
     to make the statements therein, in light of the circumstances under which
     they were made, not misleading.

               (iii)  We have no knowledge of any action, suit or proceeding
     threatened by the U.S. Food and Drug Administration against the Company
     seeking limitation, suspension or revocation of any license, permit,
     approval or authorization required by the Company to conduct its business
     as described in the Registration Statement and Prospectus.

            (i) All proceedings taken in connection with the sale of the Firm
       Shares and the Option Shares as herein contemplated shall be reasonably
       satisfactory in form and substance to the Representatives, and their
       counsel and the Underwriters shall have received from McDermott, Will &
       Emery a favorable opinion, addressed to the Representatives and dated
       such Closing Date, with respect to the Shares, the Registration Statement
       and the Prospectus, and such other related matters, as the
       Representatives may reasonably request, and the Company shall have
       furnished to McDermott, Will & Emery such documents as they may
       reasonably request for the purpose of enabling them to pass upon such
       matters.

                                      -20-


            (j) If the Shares have been qualified for sale in Florida, the
       Representatives shall have received on each Closing Date certificates,
       addressed to the Representatives, and dated such Closing Date, of an
       executive officer of the Company, to the effect that the signer of such
       certificate has reviewed and understands the provisions of Section
       517.075 of the Florida Statutes, and represents that the Company has
       complied, and at all times will comply, with all provisions of Section
       517.075 and further, that as of such Closing Date, neither the Company
       nor any of its affiliates does business with the government of Cuba or
       with any person or affiliate located in Cuba.

            (k)   The Representatives shall have received copies of the Lock-up
       Agreements executed by each entity or person described in Section 4.

            (l) The Company shall have furnished or caused to be furnished to
       the Representatives such further certificates or documents as the
       Representatives shall have reasonably requested.

            6.  Covenants of the Company.
                ------------------------

            (a)  The Company covenants and agrees as follows:

                 (i) The Company will use its best efforts to cause the
            Registration Statement, if not effective at the time of execution of
            this Agreement, and any amendments thereto, to become effective as
            promptly as possible.  The Company shall prepare the Prospectus in a
            form approved by the Representatives and file such Prospectus
            pursuant to Rule 424(b) under the Securities Act not later than the
            Commission's close of business on the second business day following
            the execution and delivery of this Agreement, or, if applicable,
            such earlier time as may be required by Rule 430A(a)(3) under the
            Securities Act.

                 (ii) The Company shall promptly advise the Representatives in
            writing (i) when any amendment to the Registration Statement shall
            have become effective, (ii) of any request by the Commission for any
            amendment of the Registration Statement or the Prospectus or for any
            additional information, (iii) of the prevention or suspension of the
            use of any preliminary prospectus or the Prospectus or of the
            issuance by the Commission of any stop order suspending the
            effectiveness of the Registration Statement or the institution or
            threatening of any proceeding for that purpose and (iv) of the
            receipt by the Company of any notification with respect to the
            suspension of the qualification of the Shares for sale in any
            jurisdiction or the initiation or threatening of any proceeding for
            such purpose.  The Company shall not file any amendment of the
            Registration Statement or supplement to the Prospectus unless the
            Company has furnished the Representatives a copy for its review
            prior to filing and shall not file any such proposed amendment or
            supplement to which the Representatives reasonably object.  The
            Company shall use its best efforts to prevent the issuance of any
            such stop order and, if issued, to obtain as soon as possible the
            withdrawal thereof.

                                      -21-


                 (iii)  If, at any time when a prospectus relating to the Shares
            is required to be delivered under the Securities Act and the Rules,
            any event occurs as a result of which the Prospectus as then amended
            or supplemented would include any untrue statement of a material
            fact or omit to state any material fact necessary to make the
            statements therein in the light of the circumstances under which
            they were made not misleading, or if it shall be necessary to amend
            or supplement the Prospectus to comply with the Securities Act or
            the Rules, the Company promptly shall prepare and file with the
            Commission, subject to the second sentence of paragraph (ii) of this
            Section 6(a), an amendment or supplement which shall correct such
            statement or omission or an amendment which shall effect such
            compliance.

                 (iv) The Company shall make generally available to its security
            holders and to the Representatives as soon as practicable, but not
            later than 45 days after the end of the 12-month period beginning at
            the end of the fiscal quarter of the Company during which the
            Effective Date occurs (or 90 days if such 12-month period coincides
            with the Company's fiscal year), an earning statement (which need
            not be audited) of the Company, covering such 12-month period, which
            shall satisfy the provisions of Section 11(a) of the Securities Act
            or Rule 158 of the Rules.

                 (v) The Company shall furnish to the Representatives and
            counsel for the Underwriters, without charge, signed copies of the
            Registration Statement (including all exhibits thereto and
            amendments thereof) and to each other Underwriter a copy of the
            Registration Statement (without exhibits thereto) and all amendments
            thereof and, so long as delivery of a prospectus by an Underwriter
            or dealer may be required by the Securities Act or the Rules, as
            many copies of any preliminary prospectus and the Prospectus and any
            amendments thereof and supplements thereto as the Representatives
            may reasonably request.

                 (vi) The Company shall cooperate with the Representatives and
            their counsel in endeavoring to qualify the Shares for offer and
            sale in connection with the offering under the laws of such
            jurisdictions as the Representatives may designate and shall
            maintain such qualifications in effect so long as required for the
            distribution of the Shares; provided, however, that the Company
            shall not be required in connection therewith, as a condition
            thereof, to qualify as a foreign corporation or to execute a general
            consent to service of process in any jurisdiction or subject itself
            to taxation as doing business in any jurisdiction.

                 (vii)  Without the prior written consent of  CIBC World Markets
            Corp., for a period of 180 days after the date of this Agreement,
            the Company and each of its individual directors and executive
            officers shall not issue, sell or register with the Commission
            (other than on Form S-8 or on any successor form), or otherwise
            dispose of, directly or indirectly, any equity securities of the
            Company (or any

                                      -22-


            securities convertible into, exercisable for or exchangeable for
            equity securities of the Company), except for the issuance of the
            Shares pursuant to the Registration Statement and the issuance of
            shares pursuant to the Company's existing stock option plan or bonus
            plan as described in the Registration Statement and the Prospectus.
            In the event that during this period, (i) any shares are issued
            pursuant to the Company's existing stock option plan or bonus plan
            that are exercisable during such 180 day period or (ii) any
            registration is effected on Form S-8 or on any successor form
            relating to shares that are exercisable during such 180 period, the
            Company shall obtain the written agreement of such grantee or
            purchaser or holder of such registered securities that, for a period
            of 180 days after the date of this Agreement, such person will not,
            without the prior written consent of CIBC World Markets Corp., offer
            for sale, sell, distribute, grant any option for the sale of, or
            otherwise dispose of, directly or indirectly, or exercise any
            registration rights with respect to, any shares of Common Stock (or
            any securities convertible into, exercisable for, or exchangeable
            for any shares of Common Stock) owned by such person.

                 (viii)  On or before completion of this offering, the Company
            shall make all filings required under applicable securities laws and
            by the Nasdaq National Market (including any required registration
            under the Exchange Act).

                 (ix) The Company shall file timely and accurate reports in
            accordance with the provisions of Florida Statutes Section 517.075,
            or any successor provision, and any regulation promulgated
            thereunder, if at any time after the Effective Date, the Company or
            any of its affiliates commences engaging in business with the
            government of Cuba or any person or affiliate located in Cuba.

                 (x) The Company will apply the net proceeds from the offering
            of the Shares in the manner set forth under "Use of Proceeds" in the
            Prospectus.

            (b) The Company agrees to pay, or reimburse if paid by the
       Representatives, whether or not the transactions contemplated hereby are
       consummated or this Agreement is terminated, all costs and expenses
       incident to the public offering of the Shares and the performance of the
       obligations of the Company under this Agreement including those relating
       to:  (i) the preparation, printing, filing and distribution of the
       Registration Statement including all exhibits thereto, each preliminary
       prospectus, the Prospectus, all amendments and supplements to the
       Registration Statement and the Prospectus, and the printing, filing and
       distribution of this Agreement; (ii) the preparation and delivery of
       certificates for the Shares to the Underwriters; (iii) the registration
       or qualification of the Shares for offer and sale under the securities or
       Blue Sky laws of the various jurisdictions referred to in Section
       6(a)(vi), including the reasonable fees and disbursements of counsel for
       the Underwriters in connection with such registration and qualification
       and the preparation, printing, distribution and shipment of preliminary
       and supplementary Blue Sky memoranda; (iv) the furnishing (including
       costs of shipping and mailing) to the Representatives and to the
       Underwriters of copies of each preliminary prospectus, the

                                      -23-


       Prospectus and all amendments or supplements to the Prospectus, and of
       the several documents required by this Section to be so furnished, as may
       be reasonably requested for use in connection with the offering and sale
       of the Shares by the Underwriters or by dealers to whom Shares may be
       sold; (v) the filing fees of the NASD in connection with its review of
       the terms of the public offering and reasonable fees and disbursements of
       counsel for the Underwriters in connection with such review; (vi)
       inclusion of the Shares for quotation on the Nasdaq National Market
       System; and (vii) all transfer taxes, if any, with respect to the sale
       and delivery of the Shares by the Company to the Underwriters. Subject to
       the provisions of Section 9, the Underwriters agree to pay, whether or
       not the transactions contemplated hereby are consummated or this
       Agreement is terminated, all costs and expenses incident to the
       performance of the obligations of the Underwriters under this Agreement
       not payable by the Company pursuant to the preceding sentence, including,
       without limitation, the fees and disbursements of counsel for the
       Underwriters.

       7.  Indemnification.
           ---------------

            (a) The Company  agrees to indemnify and hold harmless each
       Underwriter and each person, if any, who controls any Underwriter within
       the meaning of Section 15 of the Securities Act or Section 20 of the
       Exchange Act against any and all losses, claims, damages and liabilities,
       joint or several (including any reasonable investigation, legal and other
       expenses incurred in connection with, and any amount paid in settlement
       of, any action, suit or proceeding or any claim asserted), to which they,
       or any of them, may become subject under the Securities Act, the Exchange
       Act or other Federal or state law or regulation, at common law or
       otherwise, insofar as such losses, claims, damages or liabilities arise
       out of or are based upon (i) any untrue statement or alleged untrue
       statement of a material fact contained in any preliminary prospectus, the
       Registration Statement or the Prospectus or any amendment thereof or
       supplement thereto, or in any Blue Sky application or other information
       or other documents executed by the Company filed in any state or other
       jurisdiction to qualify any or all of the Shares under the securities
       laws thereof (any such application, document or information being
       hereinafter referred to as a "Blue Sky Application") or arise out of or
       are based upon any omission or alleged omission to state therein a
       material fact required to be stated therein or necessary to make the
       statements therein not misleading, (ii) in whole or in part upon any
       breach of the representations and warranties set forth in Section 4
       hereof, or (iii) in whole or in part upon any failure of the Company to
       perform any of its obligations hereunder or under law; provided, however,
       that such indemnity shall not inure to the benefit of any Underwriter (or
       any person controlling such Underwriter) on account of any losses,
       claims, damages or liabilities arising from the sale of the Shares to any
       person by such Underwriter if such untrue statement or omission or
       alleged untrue statement or omission was made in such preliminary
       prospectus, the Registration Statement or the Prospectus, or such
       amendment or supplement thereto, or in any Blue Sky Application in
       reliance upon and in conformity with information furnished in writing to
       the Company by the Representatives on behalf of any Underwriter
       specifically for use therein. This indemnity agreement will be in
       addition to any liability which the Company may otherwise have.

                                      -24-


            (b) Each Underwriter agrees, severally and not jointly, to indemnify
       and hold harmless the Company, and each person, if any, who controls the
       Company within the meaning of Section 15 of the Securities Act or Section
       20 of the Exchange Act, each director of the Company, and each officer of
       the Company who signs the Registration Statement, to the same extent as
       the foregoing indemnity from the Company to each Underwriter, but only
       insofar as such losses, claims, damages or liabilities arise out of or
       are based upon any untrue statement or omission or alleged untrue
       statement or omission which was made in any preliminary prospectus, the
       Registration Statement or the Prospectus, or any amendment thereof or
       supplement thereto, contained in the (i) concession and reallowance
       figures appearing under the caption "Underwriting" and (ii) the
       stabilization information contained under the caption "Underwriting" in
       the Prospectus; provided, however, that the obligation of each
       Underwriter to indemnify the Company (including any controlling person,
       director or officer thereof) shall be limited to the net proceeds
       received by the Company from such Underwriter.

            (c) Any party that proposes to assert the right to be indemnified
       under this Section will, promptly after receipt of notice of commencement
       of any action, suit or proceeding against such party in respect of which
       a claim is to be made against an indemnifying party or parties under this
       Section, notify each such indemnifying party of the commencement of such
       action, suit or proceeding, enclosing a copy of all papers served.  No
       indemnification provided for in Section 7(a) or 7(b) shall be available
       to any party who shall fail to give notice as provided in this Section
       7(c) if the party to whom notice was not given was unaware of the
       proceeding to which such notice would have related and was prejudiced by
       the failure to give such notice but the omission so to notify such
       indemnifying party of any such action, suit or proceeding shall not
       relieve it from any liability that it may have to any indemnified party
       for contribution or otherwise than under this Section.  In case any such
       action, suit or proceeding shall be brought against any indemnified party
       and it shall notify the indemnifying party of the commencement thereof,
       the indemnifying party shall be entitled to participate in, and, to the
       extent that it shall wish, jointly with any other indemnifying party
       similarly notified, to assume the defense thereof, with counsel
       reasonably satisfactory to such indemnified party, and after notice from
       the indemnifying party to such indemnified party of its election so to
       assume the defense thereof and the approval by the indemnified party of
       such counsel, the indemnifying party shall not be liable to such
       indemnified party for any legal or other expenses, except as provided
       below and except for the reasonable costs of investigation subsequently
       incurred by such indemnified party in connection with the defense
       thereof.  The indemnified party shall have the right to employ its
       counsel in any such action, but the fees and expenses of such counsel
       shall be at the expense of such indemnified party unless (i) the
       employment of counsel by such indemnified party has been authorized in
       writing by the indemnifying parties, (ii) the indemnified party shall
       have been advised by counsel that there may be one or more legal defenses
       available to it which are different from or in addition to those
       available to the indemnifying party (in which case the indemnifying
       parties shall not have the right to direct the defense of such action on
       behalf of the indemnified party) or (iii) the indemnifying parties shall
       not have employed counsel to

                                      -25-


       assume the defense of such action within a reasonable time after notice
       of the commencement thereof, in each of which cases the fees and expenses
       of counsel shall be at the expense of the indemnifying parties. An
       indemnifying party shall not be liable for any settlement of any action,
       suit, proceeding or claim effected without its written consent, which
       consent shall not be unreasonably withheld or delayed.

            8.  Contribution.  In order to provide for just and equitable
                ------------
       contribution in circumstances in which the indemnification provided for
       in Section 7(a) or 7(b) is due in accordance with its terms but for any
       reason is held to be unavailable to or insufficient to hold harmless an
       indemnified party under Section 7(a) or 7(b), then each indemnifying
       party  shall contribute to the aggregate losses, claims, damages and
       liabilities (including any investigation, legal and other expenses
       reasonably incurred in connection with, and any amount paid in settlement
       of, any action, suit or proceeding or any claims asserted, but after
       deducting any contribution received by any person entitled hereunder to
       contribution from any person who may be liable for contribution) to which
       the indemnified party may be subject in such proportion as is appropriate
       to reflect the relative benefits received by the Company on the one hand
       and the Underwriters on the other from the offering of the Shares or, if
       such allocation is not permitted by applicable law or indemnification is
       not available as a result of the indemnifying party not having received
       notice as provided in Section 7 hereof, in such proportion as is
       appropriate to reflect not only the relative benefits referred to above
       but also the relative fault of the Company on the one hand and the
       Underwriters on the other in connection with the statements or omissions
       which resulted in such losses, claims, damages, liabilities or expenses,
       as well as any other relevant equitable considerations.  The relative
       benefits received by the Company and the Underwriters shall be deemed to
       be in the same proportion as (x) the total proceeds from the offering
       (net of underwriting discounts but before deducting expenses) received by
       the Company, as set forth in the table on the cover page of the
       Prospectus, bear to (y) the underwriting discounts received by the
       Underwriters, as set forth in the table on the cover page of the
       Prospectus.  The relative fault of the Company or the Underwriters shall
       be determined by reference to, among other things, whether the untrue or
       alleged untrue statement of a material fact related to information
       supplied by the Company or the Underwriters and the parties' relative
       intent, knowledge, access to information and opportunity to correct or
       prevent such statement or omission.  The Company and the Underwriters
       agree that it would not be just and equitable if contribution pursuant to
       this Section 7 were determined by pro rata allocation (even if the
       Underwriters were treated as one entity for such purpose) or by any other
       method of allocation which does not take account of the equitable
       considerations referred to above.  Notwithstanding the provisions of this
       Section 8, (i) in no case shall any Underwriter (except as may be
       provided in the Agreement Among Underwriters) be liable or responsible
       for any amount in excess of the underwriting discount applicable to the
       Shares purchased by such Underwriter hereunder; (ii) the Company shall be
       liable and responsible for any amount in excess of such underwriting
       discount; provided, however, that no person guilty of fraudulent
       misrepresentation (within the meaning of Section 11(f) of the Securities
       Act) shall be entitled to contribution from any person who was not guilty
       of such fraudulent misrepresentation.  For purposes of this Section 8,
       each person, if any, who controls an

                                      -26-


       Underwriter within the meaning of Section 15 of the Securities Act or
       Section 20(a) of the Exchange Act shall have the same rights to
       contribution as such Underwriter, and each person, if any, who controls
       the Company within the meaning of the Section 15 of the Securities Act or
       Section 20(a) of the Exchange Act, each officer of the Company who shall
       have signed the Registration Statement and each director of the Company
       shall have the same rights to contribution as the Company, subject in
       each case to clauses (i) and (ii) in the immediately preceding sentence
       of this Section 8. Any party entitled to contribution will, promptly
       after receipt of notice of commencement of any action, suit or proceeding
       against such party in respect of which a claim for contribution may be
       made against another party or parties under this Section, notify such
       party or parties from whom contribution may be sought, but the omission
       so to notify such party or parties from whom contribution may be sought
       shall not relieve the party or parties from whom contribution may be
       sought from any other obligation it or they may have hereunder or
       otherwise than under this Section. No party shall be liable for
       contribution with respect to any action, suit, proceeding or claim
       settled without its written consent. The Underwriter's obligations to
       contribute pursuant to this Section 8 are several in proportion to their
       respective underwriting commitments and not joint.

          9.  Termination.  This Agreement may be terminated with respect to the
              -----------
Shares to be purchased on a Closing Date by the Representatives by notifying the
Company at any time

            (a) in the absolute discretion of the Representatives at or before
       any Closing Date: (i) if on or prior to such date, any domestic or
       international event or act or occurrence has materially disrupted, or in
       the opinion of the Representatives will in the future materially disrupt,
       the securities markets; (ii) if there has occurred any new outbreak or
       material escalation of hostilities or other calamity or crisis the effect
       of which on the financial markets of the United States is such as to make
       it, in the judgment of the Representatives, inadvisable to proceed with
       the offering; (iii) if there shall be such a material adverse change in
       general financial, political or economic conditions or the effect of
       international conditions on the financial markets in the United States is
       such as to make it, in the judgment of the Representatives, inadvisable
       or impracticable to market the Shares; (iv) if trading in the Shares has
       been suspended by the Commission or trading generally on the New York
       Stock Exchange, Inc., on the American Stock Exchange, Inc. or the Nasdaq
       National Market System has been suspended or limited, or minimum or
       maximum ranges for prices for securities shall have been fixed, or
       maximum ranges for prices for securities have been required, by said
       exchanges or by order of the Commission, the National Association of
       Securities Dealers, Inc., or any other governmental or regulatory
       authority; or (v) if a banking moratorium has been declared by any state
       or Federal authority; or (vi) if, in the judgment of the Representatives,
       there has occurred a Material Adverse Effect, or

            (b) at or before any Closing Date, that any of the conditions
       specified in Section 5 shall not have been fulfilled when and as required
       by this Agreement.

                                      -27-


          If this Agreement is terminated pursuant to any of its provisions, the
Company shall not be under any liability to any Underwriter, and no Underwriter
shall be under any liability to the Company, except that (y) if this Agreement
is terminated by the Representatives or the Underwriters because of any failure,
refusal or inability on the part of the Company to comply with the terms or to
fulfill any of the conditions of this Agreement, the Company will reimburse the
Underwriters for all out-of-pocket expenses (including the reasonable fees and
disbursements of their counsel) incurred by them in connection with the proposed
purchase and sale of the Shares or in contemplation of performing their
obligations hereunder and (z) no Underwriter who shall have failed or refused to
purchase the Shares agreed to be purchased by it under this Agreement, without
some reason sufficient hereunder to justify cancellation or termination of its
obligations under this Agreement, shall be relieved of liability to the Company,
or to the other Underwriters for damages occasioned by its failure or refusal.

          10.  Substitution of Underwriters.  If one or more of the Underwriters
               ----------------------------
shall fail (other than for a reason sufficient to justify the cancellation or
termination of this Agreement under Section 9) to purchase on any Closing Date
the Shares agreed to be purchased on such Closing Date by such Underwriter or
Underwriters, the Representatives may find one or more substitute underwriters
to purchase such Shares or make such other arrangements as the Representatives
may deem advisable or one or more of the remaining Underwriters may agree to
purchase such Shares in such proportions as may be approved by the
Representatives, in each case upon the terms set forth in this Agreement.  If no
such arrangements have been made by the close of business on the business day
following such Closing Date,

            (a) if the number of Shares to be purchased by the defaulting
       Underwriters on such Closing Date shall not exceed 10% of the Shares that
       all the Underwriters are obligated to purchase on such Closing Date, then
       each of the nondefaulting Underwriters shall be obligated to purchase
       such Shares on the terms herein set forth in proportion to their
       respective obligations hereunder; provided, that in no event shall the
       maximum number of Shares that any Underwriter has agreed to purchase
       pursuant to Section 1 be increased pursuant to this Section 10 by more
       than one-ninth of such number of Shares without the written consent of
       such Underwriter, or

            (b) if the number of Shares to be purchased by the defaulting
       Underwriters on such Closing Date shall exceed 10% of the Shares that all
       the Underwriters are obligated to purchase on such Closing Date, then the
       Company shall be entitled to one additional business day within which it
       may, but is not obligated to, find one or more substitute underwriters
       reasonably satisfactory to the Representatives to purchase such Shares
       upon the terms set forth in this Agreement.

          In any such case, either the Representatives or the Company shall have
the right to postpone the applicable Closing Date for a period of not more than
five business days in order that necessary changes and arrangements (including
any necessary amendments or supplements to the Registration Statement or
Prospectus) may be effected by the Representatives and the Company.  If the
number of Shares to be purchased on such Closing Date by such defaulting
Underwriter or Underwriters shall exceed 10% of the Shares that all the
Underwriters are obligated to purchase on

                                      -28-


such Closing Date, and none of the nondefaulting Underwriters or the Company
shall make arrangements pursuant to this Section within the period stated for
the purchase of the Shares that the defaulting Underwriters agreed to purchase,
this Agreement shall terminate with respect to the Shares to be purchased on
such Closing Date without liability on the part of any nondefaulting Underwriter
to the Company and without liability on the part of the Company, except in both
cases as provided in Sections 6(b), 7, 8 and 9. The provisions of this Section
shall not in any way affect the liability of any defaulting Underwriter to the
Company or the nondefaulting Underwriters arising out of such default. A
substitute underwriter hereunder shall become an Underwriter for all purposes of
this Agreement.

          11.  Miscellaneous.  The respective agreements, representations,
               -------------
warranties, indemnities and other statements of the Company or its officers and
of the Underwriters set forth in or made pursuant to this Agreement shall remain
in full force and effect, regardless of any investigation made by or on behalf
of any Underwriter or the Company or any of the officers, directors or
controlling persons referred to in Sections 9 and 10 hereof, and shall survive
delivery of and payment for the Shares.  The provisions of Sections 6(b), 7, 8
and 9 shall survive the termination or cancellation of this Agreement.

          This Agreement has been and is made for the benefit of the
Underwriters, the Company and their respective successors and assigns, and, to
the extent expressed herein, for the benefit of persons controlling any of the
Underwriters, or the Company, and directors and officers of the Company, and
their respective successors and assigns, and no other person shall acquire or
have any right under or by virtue of this Agreement.  The term "successors and
assigns" shall not include any purchaser of Shares from any Underwriter merely
because of such purchase.

          All notices and communications hereunder shall be in writing and
mailed or delivered or by telephone or telegraph if subsequently confirmed in
writing, (a) if to the Representatives, c/o CIBC World Markets Corp., One World
Financial Center, New York, New York 10281 Attention:________________, with a
copy to McDermott, Will & Emery, 2049 Century Park East, Suite 3400, Los
Angeles, California 90067, Attention: Mark J. Mihanovic and (b) if to the
Company, to its agent for service as such agent's address appears on the cover
page of the Registration Statement with a copy to Wilson Sonsini Goodrich &
Rosati, Professional Corporation, One Market, Spear Tower, San Francisco,
California 94105.

          This Agreement shall be governed by and construed in accordance with
the laws of the State of New York without regard to principles of conflict of
laws.

          This Agreement may be signed in any number of counterparts, each of
which shall be an original, with the same effect as if the signatures thereto
and hereto were upon the same instrument.

                                      -29-


            Please confirm that the foregoing correctly sets forth the agreement
among us.

                                      Very truly yours,

                                      CELL THERAPEUTICS, INC.

                                      By __________________________________
                                         Title:



Confirmed:

CIBC WORLD MARKETS CORP.
U.S. BANCORP PIPER JAFFRAY

Acting severally on behalf of itself
and as representative of the several
Underwriters named in Schedule I annexed
hereto.

By CIBC WORLD MARKETS CORP.

By __________________________________
   Title:

                                      -30-


                                 SCHEDULE I



                                                            Number of
                                                            Firm Shares to
    Name                                                    Be Purchased
    ----                                                    --------------

       CIBC World Markets Corp.
       U.S. Bancorp Piper Jaffray




                                                            --------------
                                                   Total

                                      -31-