<PAGE>   1

                                                                   EXHIBIT 10.25









                                    AGREEMENT

                        FOR SERVICES RELATING TO THE [*]

                                 EXPRESSING [*]

                                     BETWEEN

                               LONZA BIOLOGICS PLC

                                       AND

                              XCYTE THERAPIES, INC.



*Certain information on this page has been omitted and filed
 separately with the Commission. Confidential treatment has
 been requested with respect to the omitted portions.


<PAGE>   2





                                    AGREEMENT

                        For Services Relating to the [*]

                                 Expressing [*]

                                     between

                               LONZA BIOLOGICS PLC

                                       and

                              XCYTE THERAPIES, INC.





*Certain information on this page has been omitted and filed
 separately with the Commission. Confidential treatment has
 been requested with respect to the omitted portions.






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THIS AGREEMENT is made the 6 day of June, 2000

BETWEEN

1.      LONZA BIOLOGICS PLC, the registered office of which is at 228 Bath Road,
        Slough, Berkshire SL1 4DY, England ("LB"), and

2.      XCYTE THERAPIES, INC., of 1124 Columbia Street, Suite 130, Seattle,
        Washington 98104, USA, ("Customer").

WHEREAS

A.      Customer is the proprietor of, or licensed to use, the [*] (designated
        at LB as [*]) expressing [*], and

B.      LB has the expertise in the development of process for and manufacture
        of similar products, and

C.      Customer wishes to contract with LB for services to develop a Process
        for and manufacture Product, and

D.      LB is prepared to perform such Services for Customer on the terms and
        conditions set out herein, and

E.      LB will where scientifically possible perform such Services in parallel
        with Services to produce [*] for Customer.


NOW THEREFORE it is agreed as follows:

1.      In this Agreement, its recitals and the schedules hereto, the words and
        phrases defined in Schedule 4 hereto and in the Standard Terms for
        Contract Services set out in Schedule 5 hereto shall have the meanings
        set out therein.

2.      Subject to the Standard Terms for Contract Services set out in Schedule
        5 and any Special Terms, LB agrees to perform the Services and the
        Customer agrees to pay the Price together with any additional costs and
        expenses that fall due hereunder.

3.      3.1     Any notice or other communication to be given under this
                Agreement shall be delivered personally or sent by facsimile
                transmission, or if facsimile transmission is not available, by
                first class pre-paid post addressed as follows:

                3.1.1   if to LB to:

                        Lonza Biologics plc
                        228 Bath Road



*Certain information on this page has been omitted and filed
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\

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<PAGE>   4

                        Slough
                        Berkshire SL1 4DY

                        Facsimile: 01753 777001
                        For the attention of the Head of Legal Services

                3.1.2   if to the Customer to:
                        Xcyte Therapies, Inc.
                        1124 Columbia Street
                        Suite 130
                        Seattle
                        Washington 98104

                        Facsimile: 206 262 0900
                        For the attention of Director, Business Development

                or to such other destination as either party hereto may
                hereafter notify to the other in accordance with the provisions
                of this clause.

        3.2     All such notices or other communications shall be deemed to have
                been served as follows:

                3.2.1   if delivered personally, at the time of such delivery;

                3.2.2   if sent by facsimile, upon receipt of the transmission
                        confirmation slip showing completion of the
                        transmission;

                3.2.3   if sent by first class pre-paid post, ten (10) business
                        days (Saturdays, Sundays and Bank or other public
                        holidays excluded) after being placed in the post.


AS WITNESS the hands of the duly authorised representatives of the parties
hereto the day and year first above written.


Signed for and on behalf of                /s/ EDWIN DAVIES
                                           -------------------------------------
LONZA BIOLOGICS PLC
                                           President                       Title
                                           -------------------------------


Signed for and on behalf of                /s/ Ronald Jay Berenson
                                           -------------------------------------
XCYTE THERAPIES, INC.
                                           President & CEO                 Title
                                           -------------------------------



                                      -3-
<PAGE>   5

                                   SCHEDULE 1

[*]





*Certain information on this page has been omitted and filed
 separately with the Commission. Confidential treatment has
 been requested with respect to the omitted portions.




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                                   SCHEDULE 2

                                    SERVICES

                                    CONTENTS

[*]




*Certain information on this page has been omitted and filed
 separately with the Commission. Confidential treatment has
 been requested with respect to the omitted portions.



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                                   SCHEDULE 3

                           PRICE AND TERMS OF PAYMENT

1.0 Price

        In consideration for LB carrying out the Services as detailed in
        Schedule 2 the Customer shall pay LB, as follows

<TABLE>
<CAPTION>
STAGE                                        PRICE (UK (POUND) STERLING)
<S>                                          <C>
1                    [*]                     (pound) 105,000

2                    [*]                     (pound)  64,000(1)

3                    [*]                     (pound)  73,500

4                    [*]                     (pound)  26,250

5                    [*]                     (pound)  79,000

6                    [*]                     (pound) 295,000(2)

7                    [*]                     (pound)  17,000(3)

8                    [*]                     (pound)  40,000(4)

9                    [*]                     (pound)  30,000

10                   [*]                     (pound)  57,750

11                   [*]                     (pound)  12,500 per time point

12                   [*]                     (pound)  50,000

13                   [*]                     (pound)   7,000
</TABLE>

[*]

2.0  Payment

        Payment by the Customer of the Price for each Stage shall be made
        against LB invoices on the following basis:

        [*]



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 been requested with respect to the omitted portions.




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                                   SCHEDULE 4

                                  SPECIAL TERMS

[*]





*Certain information on this page has been omitted and filed
 separately with the Commission. Confidential treatment has
 been requested with respect to the omitted portions.





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                                   SCHEDULE 5

                       TERMS FOR CONTRACT SERVICES FOR [*]
                            FOR XCYTE THERAPIES, INC.


1.      Interpretation

        1.1     In these Standard Terms, unless the context requires otherwise:

                1.1.1   "Affiliate" means any Company, partnership or other
                        entity which directly or indirectly controls, is
                        controlled by or is under common control with the
                        relevant party to this Agreement. "Control" means the
                        ownership of more than fifty per cent (50%) of the
                        issued share capital or the legal power to direct or
                        cause the direction of the general management and
                        policies of the party in question.

                1.1.2   "Agreement" means any contract between LB and a Customer
                        incorporating these Standard Terms.

                1.1.3   "Cell Line" means the cell line, particulars of which
                        are set out in Schedule 1.

                1.1.4   "cGMP" means Good Manufacturing Practices and General
                        Biologics Products Standards as promulgated under the US
                        Federal Food Drug and Cosmetic Act at 21CFR (Chapters
                        210, 211, 600 and 610) and the Guide to Good
                        Manufacturing Practices for Medicinal Products as
                        promulgated under European Directive 91/356/EEC. LB's
                        operational quality standards are defined in internal
                        GMP policy documents. Additional product-specific
                        development documentation and validation work may be
                        required to support regulatory applications to conduct
                        clinical trials or market a product.

                1.1.5   "Customer" includes any person to whom a Proposal is
                        issued by LB.

                1.1.6   "Customer information" means all technical and other
                        information not known to LB or in the public domain
                        relating to the Cell Line, the Process and the Product,
                        from time to time supplied by the Customer to LB.

                1.1.7   "Customer Materials" means the Materials supplied by
                        Customer to LB (if any) and identified as such by
                        Schedule 1 hereto.

                1.1.8   "Customer Tests" means the tests to be carried out on
                        the Product immediately following receipt of the Product
                        by the Customer, particulars of which are set out in
                        Schedule 1.

                1.1.9   "ex works" means LB has fulfilled its obligation to
                        deliver when it has made the object of delivery
                        available at its premises to the Customer or the
                        Customer's agent (or to LB's carrier if the provisions
                        of Clause 5.1 of this Schedule 5 apply). For the
                        avoidance of doubt, unless otherwise agreed in writing,
                        LB is not responsible for loading the object of delivery
                        on to the vehicle provided by the Customer or the
                        Customers agent (or to LB's nominated carrier if Clause
                        5.1 of this Schedule 5 applies) or for delaying the
                        object of delivery for export.




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                1.1.10  "LB Know-How" means all technical and other information
                        relating to the Process known to LB from time to time
                        other than confidential Customer Information and
                        information in the public domain.

                1.1.11  "Patent Rights" means all patents and patent
                        applications of any kind throughout the world relating
                        to the Process which from time to time LB is the owner
                        of or is entitled to use but not in any case any patent
                        rights owned or controlled by Customer or its
                        licensor/supplier.

                1.1.12  "Price" means the price specified in Schedule 3 for the
                        Services.

                1.1.13  "Process" means the process for the production of the
                        Product from the Cell Line, including any improvements
                        thereto from time to time.

                1.1.14  "Product" means all or any part of the product
                        (including any sample thereof), particulars of which are
                        set out in Schedule 1.

                1.1.15  "Proposal" means any proposal or quotation issued by LB.

                1.1.16  "Services" means all or any part of the services the
                        subject of the Agreement or Proposal (including, without
                        limitation, cell culture evaluation, purification
                        evaluation, master, working and extended cell bank
                        creation, and sample and bulk production), particulars
                        of which are set-out in Schedule 2.

                1.1.17  "Special Term" means any term additional or supplemental
                        to these Standard Terms from time to time agreed in
                        writing between LB and the Customer. Particulars of any
                        Special Terms at the date of the Agreement are set out
                        in Schedule 4.

                1.1.18  "Specification" means the specification for Product,
                        particulars of which are set out In Schedule 1.

                1.1.19  "Terms of Payment" means the terms of payment specified
                        in Schedule 3.

                1.1.20  "Testing Laboratories" means any third party instructed
                        by LB to carry out tests on the Cell Line or the
                        Product.

        1.2     Unless the context requires otherwise, words and phrases defined
                in any other part of the Agreement shall bear the same meanings
                in these Standard Terms, references to the singular number
                include the plural and vice versa, references to Schedules are
                references to schedules to the Agreement, and references to
                Clauses are references to clauses of these Standard Terms.

        1.3     In the event of a conflict between a Special Term and these
                Standard Terms, the Special Term shall prevail.

2.      Applicability of Standard Terms

        2.1     Unless agreed otherwise, these Standard Terms shall apply to
                every Proposal and Agreement, and to any services additional to
                the Services requested by a Customer. LB shall not be bound by
                any terms which may be inconsistent with these Standard Terms
                and the Special Terms. No variation of or addition to these
                Standard Terms and the Special Terms or any other term of an
                Agreement shall be effective unless in writing and signed for
                and on behalf of LB and Customer. For the avoidance of doubt,
                amendments to the draft Specification or Specification for
                Product shall be effective if reduced to writing and signed by
                the regulatory



                                      -11-
<PAGE>   11

                representative of both Parties, which regulatory representative
                shall be nominated from time to time by the parties.

        2.2     Unless previously withdrawn, a Proposal is open for acceptance
                within the period stated therein. Where no period is stated, the
                Proposal shall be open for acceptance within thirty (30) days
                from the date it is issued unless withdrawn in the meantime. Any
                acceptance by a Customer of a Proposal shall not create a
                binding contract.

        2.3     A binding contract shall only be created when LB has accepted in
                writing an offer placed by a Customer.

3.      Supply by Customer

        3.1     Prior to or immediately following the date of the Agreement the
                Customer shall supply to LB the Customer Information, together
                with full details of any hazards relating to the Cell Line
                and/or the Customer Materials, their storage and use. On review
                of this Customer Information, the Cell Line and/or the Customer
                Materials shall be provided to LB at LB's request. Property in
                the Cell Line and/or the Customer Materials supplied to LB shall
                remain vested in the Customer.

        3.2     The Customer hereby grants LB [*]. LB hereby undertakes not to
                use the Cell Line, the Customer Materials or the Customer
                Information (or any part thereof) for any other purpose.

        3.3     LB shall:

                3.3.1   at all times use all reasonable endeavours to keep the
                        Cell Line and/or the Customer Materials secure and safe
                        from loss and damage in such manner as LB stores its own
                        material of similar nature;

                3.3.2   not part with possession of the Cell Line and/or the
                        Customer Materials or the Product, save for the purpose
                        of tests at the Testing Laboratories; and

                3.3.3   procure that all Testing Laboratories are subject to
                        obligations of confidence and restrictions to use and
                        transfer substantially in the form of those obligations
                        of confidence imposed on LB under these Standard Terms.

        3.4     The Customer warrants to LB that:

                3.4.1   the Customer is and shall at all times throughout the
                        duration of the Agreement remain entitled to supply the
                        Cell Line, the Customer Materials and Customer
                        Information to LB;

                3.4.2   to the best of the Customer's knowledge and belief the
                        use by LB of the Cell Line, the Customer Materials or
                        and the Customer Information for the Services will not
                        infringe any rights (including, without limitation, any
                        intellectual or industrial property rights) vested in
                        any third party; and

                3.4.3   the Customer will notify LB, in writing, immediately it
                        knows or ought to know that it is no longer entitled to
                        supply the Cell Line, the Customer Materials and/or the
                        Customer Information to LB or that the use by LB of the
                        Cell Line, the Customer Materials or the Customer
                        Information for the Services infringes or is alleged to
                        infringe any rights (including, without limitation, any
                        intellectual or industrial property rights) vested in
                        any third party.




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        3.5     Provided that LB gives Customer prompt written notice and full
                particulars of any claim, tenders to Customer, full control of
                any defense or settlement and co-operates fully with Customer,
                the Customer undertakes to indemnify and to maintain LB promptly
                indemnified against any loss, damage, costs and expenses of any
                nature (including court costs and legal fees on a full indemnity
                basis), whether direct or consequential, and whether or not
                foreseeable or in the contemplation of LB or the Customer, that
                LB may suffer arising out of or incidental to any breach of the
                warranties given by the Customer under Clause 3.4 above or any
                claims alleging LB's use of the Cell Line, the Customer
                Materials or the Customer Information infringes any rights
                (including, without limitation, any intellectual or industrial
                property rights) vested in any third party (whether or not the
                Customer knows or ought to have known about the same), however
                it is agreed that LB will retain its own independent legal
                counsel with settlement of any claim requiring LB's prior
                written consent which shall not be unreasonably withheld.

        3.6     The obligations of LB and the Customer under this Clause 3 shall
                survive the termination for whatever reason of the Agreement.

4.      Provision of the Services

        4.1     LB shall diligently carry out the Services as provided in
                Schedule 2 and shall use all reasonable efforts to achieve the
                estimated timescales therefor.

        4.2     Due to the unpredictable nature of the biological processes
                involved in the Services, the timescales set down for the
                performance of the Services (including without limitation the
                dates for production and delivery of Product) and the quantities
                of Product for delivery set out in Schedule 2 are estimated
                only.

        4.3     Provided that LB has complied with Section 4.1 the Customer
                shall not be entitled to cancel any unfulfilled part of the
                Services or to refuse to accept the Services on grounds of late
                performance, late delivery or failure to produce the estimated
                quantities of Product for delivery. LB shall not be liable for
                any loss, damage, costs or expenses of any nature, whether
                direct or consequential, occasioned by:

                4.3.1   any delay in performance or delivery howsoever caused;
                        or

                4.3.2   any failure to produce the estimated quantities of
                        Product for delivery.

        4.4     LB shall comply with the regulatory requirements from time to
                applicable to the Services as set out in Schedule 2 hereto,
                including without limitation all relevant requirements of
                current Good Manufacturing Practices under the policies and
                practices of the US FDA and European Regulatory Authorities and
                shall consider ICH and other relevant regulatory guidance
                documents whether or not set forth with precision in said
                Schedule 2. If the Customer requests LB to comply with any other
                regulatory or similar legislative requirements LB shall use all
                reasonable commercial endeavours to do so provided that:

                4.4.1   the Customer shall be responsible for informing LB in
                        writing of the precise foreign requirements which the
                        Customer is requesting LB to observe;

                4.4.2   such foreign requirements do not conflict with any
                        mandatory requirements under the laws of England;



                                      -13-
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                4.4.3   LB shall be under no obligation to ensure that such
                        written information complies with the applicable
                        requirements of any foreign jurisdiction; and

                4.4.4   all costs and expenses incurred by LB in complying with
                        such foreign requirements shall be charged to the
                        Customer in addition to the Price.

        4.5     Delivery of Product shall be ex-works LB's premises (Incoterms
                1990). Risk in and title to Product shall pass on delivery.
                Transportation of Product, whether or not under any arrangements
                made by LB on behalf of the Customer, shall be made at the sole
                risk and expense of the Customer.

        4.6     Unless otherwise agreed, LB shall package and label Product for
                delivery ex-works in accordance with its standard operating
                procedures. It shall be the responsibility of the Customer to
                inform LB in writing in advance of any special packaging and
                labelling requirements for Product. All additional costs and
                expenses of whatever nature incurred by LB in complying with
                such special requirements shall be charged to the Customer in
                addition to the Price.

5.      Transportation of Product and Customer Tests

        5.1     If requested by the Customer, LB will (acting as agent of the
                Customer for such purpose) arrange the transportation of Product
                from LB's premises to the destination indicated by the Customer
                together with insurance cover for Product in transit at its
                invoiced value. All additional costs and expenses of whatever
                nature incurred by LB in arranging such transportation and
                insurance shall be charged to the Customer in addition to the
                Price.

        5.2     Where LB has made arrangements for the transportation of
                Product, the Customer shall diligently examine the Product as
                soon as practicable after receipt. Notice of all claims (time
                being of the essence) arising out of:

                5.2.1   damage to or total or partial loss of Product in transit
                        shall be given in writing to LB and the carrier within
                        three (3) working days of delivery; or

                5.2.2   non-delivery shall be given in writing to LB within ten
                        (10) days after the date of LB's dispatch notice.

        5.3     The Customer shall make damaged Product available for inspection
                and shall comply with the requirements of any insurance policy
                covering the Product notified by LB to the Customer. LB shall
                offer the Customer all reasonable assistance (at the cost and
                expense of the Customer) in pursuing any claims arising out of
                the transportation of Product.

        5.4     Promptly following receipt of Product or any sample thereof, the
                Customer shall carry out the Customer Tests. PROVIDED ALWAYS the
                Specification for such Product is not stated to be in draft
                form, if the Customer Tests show that the Product fails to meet
                Specification, the Customer shall give LB written notice thereof
                within forty-five (45) days from the date of delivery of the
                Product ex-works and shall return such Product to LB's premises
                for further testing. In the absence of such written notice
                Product shall be deemed to have been accepted by the Customer as
                meeting Specification. If LB is satisfied that Product returned
                to LB fails to meet Specification and that such failure is not
                due (in whole or in part) to acts or omissions of the Customer
                or any third party after delivery of such Product ex-works, LB
                shall at Customer's discretion refund that part of the Price



                                      -14-
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                that relates to the production of such Product or replace such
                Product at its own cost and expense. In the event Customer
                requires LB to replace such Product, LB shall be entitled to
                have regard to its commercial commitments to third parties in
                the timing of such replacement and will consider Customer's
                requirements in as fair and equal manner as it considers other
                third party customer requirements, Customer acknowledges that
                there may, therefore, be a delay in the timing of the
                replacement of such Product.

                FOR THE AVOIDANCE OF DOUBT, WHERE THE SPECIFICATION IS STATED
                TO BE IN DRAFT FORM LB SHALL BE OBLIGED ONLY TO USE ITS
                REASONABLE ENDEAVOURS TO PRODUCE PRODUCT THAT MEETS
                SPECIFICATION.

        5.5     If there is any dispute concerning whether Product returned to
                LB, fails to meet Specification or whether such failure is due
                (in whole or in part) to acts or omissions of the Customer or
                any third party after delivery of such Product ex-works, such
                dispute shall be referred for decision to an independent expert
                (acting as an expert and not as an arbitrator) to be appointed
                by agreement between LB and the Customer or, in the absence of
                agreement by the President for the time being of the Association
                of the British Pharmaceutical Industry. The costs of such
                independent expert shall be borne equally between LB and the
                Customer. The decision of such independent expert shall be in
                writing and, save for manifest error on the face of the
                decision, shall be binding on both LB and the Customer.

        5.6     The provisions of Clauses 5.4 and 5.5 shall be the sole remedy
                available to the Customer in respect of Product that fails to
                meet Specification.

6.      Price and Terms of Payment

        6.1     The Customer shall pay the Price in accordance with the Terms of
                Payment.

        6.2     Unless otherwise indicated in writing by LB. all prices and
                charges are exclusive of Value Added Tax or of any other
                applicable taxes, levies, imposts, duties and fees of whatever
                nature imposed by or under the authority of any government or
                public authority, which shall be paid by the Customer (other
                than taxes on LB's income). All Invoices are strictly net and
                payment must be made within thirty (30) days of date of invoice.
                Payment shall be made without deduction, deferment, set-off,
                lien or counterclaim of any nature.

        6.3     In default of payment on due date:

                6.3.1   interest shall accrue on any amount overdue at the rate
                        of [*] above the base lending rate from time to time of
                        HSBC Bank plc, interest to accrue on a day to day basis
                        both before and after judgement; and

                6.3.2   LB shall, at its sole discretion, and without prejudice
                        to any other of its accrued rights, be entitled to
                        suspend the provision of the Services or to treat the
                        Agreement as repudiated by notice in writing to the
                        Customer exercised at any time thereafter.

7.      Warranty and Limitation of Liability

        7.1 LB warrants that:

                7.1.1   the Services shall be performed in accordance with
                        Clause 4.1; and




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                7.1.2   the Product shall meet Specification on delivery, save
                        where the Specification is stated to be in draft form
                        when LB shall be obliged only to use its reasonable
                        endeavours to produce Product that meets Specification.

        7.2     Clause 7.1 is in lieu of all conditions, warranties and
                statements in respect of the Services and/or the Product whether
                expressed or implied by statute, custom of the trade or
                otherwise (including but without limitation any such condition,
                warranty or statement relating to the description or quality of
                the Product, its fitness for a particular purpose or use under
                any conditions whether or not known to LB) and any such
                condition, warranty or statement is hereby excluded.

        7.3     Without prejudice to the terms of Clauses 5.6, 7.1. 7.2, 7.4 and
                7.6, the liability of LB for any loss or damage suffered by the
                Customer as a direct result of any breach of the Agreement or of
                any other liability of LB (including misrepresentation and
                negligence or third party claim brought against Customer
                relating solely to LB know-how) in respect of the Services
                (including without limitation the production and/or supply of
                the Product) shall be limited to the payment by LB of damages
                which shall not exceed [*].

        7.4     Subject to Clause 7.6, LB shall not be liable for the following
                loss or damage howsoever caused (even if foreseeable or in the
                contemplation of LB or the Customer):

                7.4.1   loss of profits, business or revenue whether suffered
                        by the Customer or any other person; or

                7.4.2   special, indirect or consequential loss, whether
                        suffered by the Customer or any other person; and

                7.4.3   any loss arising from any claim made against the
                        Customer by any other person.

        7.5     Provided that LB gives Customer prompt written notice and full
                particulars of any claim, tenders to Customer, full control of
                any defense or settlement, and co-operate fully with Customer,
                the Customer shall indemnify and maintain LB promptly
                indemnified against all claims, actions, costs, expenses of any
                nature (including court costs and legal fees on a full indemnity
                basis) or other liabilities whatsoever in respect of the
                following, it been agreed, however that LB will retain its own
                independent legal counsel with settlement of any claim requiring
                LB's prior written consent which will not be unreasonably
                withheld:

                7.5.1   any liability under the Consumer Protection Act 1987,
                        unless such liability is caused by the negligent act or
                        omission of LB in the production and/or supply of the
                        Product; and

                7.5.2   any product liability (other than that referred to in
                        Clause 7.5.1) in respect of Product, unless such
                        liability is caused by the negligent act or omission of
                        LB in the production and/or supply of Product; and

                7.5.3   any negligent or willful act or omission of the Customer
                        in relation to the use, processing, storage or sale of
                        the Product.

        7.6     Nothing contained in these Standard Terms shall purport to
                exclude or restrict any liability for death or personal injury
                resulting directly from negligence by LB in




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                                      -16-
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                carrying out the Services or any liability for breach of the
                implied undertakings of LB as to title.

        7.7     The obligations of LB and the Customer under this Clause 7 shall
                survive the termination for whatever reason of the Agreement.

8.      Customer Information, LB Know-How and Patent Rights

        8.1     The Customer acknowledges that LB Know-How and LB acknowledges
                that Customer Information with which it is supplied by the other
                pursuant to the Agreement is supplied, subject to Clause 8.4, in
                circumstances imparting an obligation of confidence and each
                agrees to keep such LB Know-How or such Customer Information
                secret and confidential and to respect the other's proprietary
                rights therein and not at any time for any reason whatsoever to
                disclose or permit such LB Know-How or such Customer Information
                to be disclosed to any third party save as expressly provided
                herein.

        8.2     The Customer and LB shall each procure that all their respective
                employees, consultants and contractors having access to
                confidential LB Know-How or confidential Customer Information
                shall be subject to the same obligations of confidence as the
                principals pursuant to Clause 8.1 and shall enter into secrecy
                agreements in support of such obligations. Insofar as this is
                not reasonably practicable, the principals shall take all
                reasonable steps to ensure that any such employees, consultants
                and contractors are made aware of such obligations.

        8.3     LB and the Customer each undertake not to disclose or permit to
                be disclosed to any third party, or otherwise make use of or
                permit to be made use of, any trade secrets or confidential
                information relating to the technology, business affairs or
                finances of the other, any subsidiary, holding company or
                subsidiary or any such holding company of the other, or of any
                suppliers, agents, distributors, licensees or other customers of
                the other which comes into its possession under this Agreement.

        8.4     The obligations of confidence referred to in this Clause 8 shall
                not extend to any information which:

                8.4.1   is or becomes generally available to the public
                        otherwise than by reason of a breach by the recipient
                        party of the provisions of this Clause 8;

                8.4.2   is known to the recipient party and is at its free
                        disposal prior to its receipt from the other;

                8.4.3   is subsequently disclosed to the recipient party without
                        being made subject to an obligation of confidence by a
                        third party;

                8.4.4   LB or the Customer may be required to disclose under any
                        statutory, regulatory or similar legislative
                        requirement, subject to the imposition of obligations of
                        secrecy wherever possible in that relation; or

                8.4.5   is developed by any servant or agent of the recipient
                        party without access to or use or knowledge of the
                        information by the disclosing party.

        8.5     The Customer acknowledges that:

                8.5.1   LB Know-How and the Patent Rights are vested in LB or LB
                        is otherwise entitled thereto; and



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<PAGE>   17

                8.5.2   the Customer shall not at any time have any right,
                        title, licence or interest in or to LB Know-How, the
                        Patent Rights or any other intellectual property rights
                        relating to the Process which are vested in LB or to
                        which LB is otherwise entitled.

        8.6     LB acknowledges that:

                8.6.1   Customer has undertaken that the Customer Information is
                        vested in the Customer or the Customer is otherwise
                        entitled thereto; and

                8.6.2   save as provided herein LB shall not at any time have
                        any right, title, license or interest in or to the
                        Customer information or any other Intellectual Property
                        rights vested in Customer or to which the Customer is
                        entitled.

        8.7     The obligations of LB and the Customer under this Clause 8 shall
                survive the termination for whatever reason of the Agreement.

9.      Termination

        9.1     If it becomes apparent to either LB or the Customer at any stage
                in the provision of the Services that it will not be possible to
                complete the Services for scientific or technical reasons, a
                sixty (60) day period shall be allowed for discussion to resolve
                such problems. If such problems are not resolved within such
                period, LB and the Customer shall each have the right to
                terminate the Agreement forthwith by notice in writing. In the
                event of such termination, the Customer shall pay to LB a
                termination sum calculated by reference to all the Services
                performed by LB prior to such termination (including a pro rata
                proportion of the Price for any stage of the Services which is
                in process at the date of termination) and all expenses
                reasonably incurred by LB in giving effect to such termination,
                including the costs of terminating any commitments entered into
                under the Agreement, such termination sum not to exceed the
                balance of the Price for the remaining services not yet
                commenced, LB will engage in good faith efforts to offer to
                other third party customers those development resources or
                manufacturing slots which become available due to termination by
                Customer of this Agreement, and Customer will not be required to
                pay for that portion of the Services and related expenses that
                LB is able to charge to such other customers.

        9.2     Customer shall be entitled to terminate this Agreement at any
                time for any reason by sixty (60) days' notice to LB in writing.
                In the event of Customer serving notice to terminate this
                Agreement which notice is expressed to be given pursuant to this
                Clause 9.2, Customer shall:

                9.2.1   pay LB a termination sum calculated in accordance with
                        the principles of Clause 9.1 above, and

                9.2.2   In the event notice to terminate this Agreement pursuant
                        to this Clause 9.2 is issued to LB within six (6) months
                        of LB's then estimated start date for any stage of the
                        Services which includes cGMP fermentation activities,
                        Customer shall pay LB a sum (to the extent not already
                        payable as noted above in accordance with the principles
                        of Clause 9.1) equal to not less than ten percent (10%)
                        nor more than eighty-five percent (85%) of the full
                        Price of that stage, or those stages, in question, as
                        provided in Clause 9.2.3



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<PAGE>   18

                        below. Such payment shall fall due to LB on or before
                        the date of termination of the Services. For the
                        avoidance of doubt activities relating to cGMP
                        fermentation shall be deemed to commence with the date
                        of removal of the vial of cells for the performance of
                        the fermentation from frozen storage.

                9.2.3   In the event of Customer serving notice to terminate
                        this Agreement in the circumstances described in Clause
                        9.2.2, LB shall use reasonable endeavours to substitute
                        a requirement for the manufacturing slot which becomes
                        available due to Customer of the Agreement. If LB finds
                        such an alternative third party selling the
                        manufacturing slot, which third party requirement is not
                        for business (i.e. LB shall not be required to
                        reschedule parties), the fee payable by Customer under
                        Clause 10% of the price for the manufacturing slot
                        originally amount, if any, by which the fees to be paid
                        for such customer is less than 85% of the price under
                        this originally reserved for Customer. If LB is
                        substitute a third party requirement for the such
                        manner, Customer shall be liable to of the price under
                        this Agreement third party termination by and is
                        successful in previously contracted existing commitments
                        to third parties), the fee payable by Customer under
                        Clause 9.2.2 shall equal the greater of (a) reserved for
                        Customer and (b) the manufacturing slot by such other
                        Agreement for the manufacturing slot unable, by using
                        reasonable endeavours, to manufacturing slot reserved
                        for Customer in pay LB under Clause 9.2.2 a sum equal to
                        85% for the manufacturing slot.

        9.3     LB and the Customer may each terminate the Agreement forthwith
                by notice in writing to the other upon the occurrence of any of
                the following events:

                9.3.1   if the other commits a breach of the Agreement which (in
                        the case of a breach capable of remedy) is not remedied
                        within thirty (30) days of the receipt by the other of
                        notice identifying the breach and requiring its remedy;
                        or

                9.3.2   if the other ceases for any reason to carry on business
                        or compounds with or convenes a meeting of its creditors
                        or has a receiver or manager appointed in respect of all
                        or any part of its assets or is the subject of an
                        application for an administration order or of any
                        proposal for a voluntary arrangement or enters into
                        liquidation (whether compulsorily or voluntarily) or
                        undergoes any analogous act or proceedings under foreign
                        law.

        9.4     Upon the termination of the Agreement for whatever reason:

                9.4.1   LB shall promptly return all Customer Information to the
                        Customer and shall dispose of or return to the Customer
                        the Customer Materials (and where supplied by Customer
                        the Cell Line) and any materials therefrom, as directed
                        by the Customer;

                9.4.2   the Customer shall promptly return to LB all LB Know-How
                        it has received from LB;



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<PAGE>   19

                9.4.3   the Customer shall not thereafter use or exploit the
                        Patent Rights or the LB Know-How in any way whatsoever;

                9.4.4   LB may thereafter use or exploit the Patent Rights or
                        the LB Know-How in any way whatsoever without
                        restriction; and

                9.4.5   LB and the Customer shall do all such acts and things
                        and shall sign and execute all such deeds and documents
                        as the other may reasonably require to evidence
                        compliance with this Clause 9.4.

        9.5     Termination of the Agreement for whatever reason shall not
                affect the accrued rights of either LB or the Customer arising
                under or out of this Agreement and all provisions which are
                expressed to survive the Agreement shall remain in full force
                and effect.

10.     Force Majeure

        10.1    If LB is prevented or delayed in the performance of any of its
                obligations under the Agreement by Force Majeure and shall give
                written notice thereof to the Customer specifying the matters
                constituting Force Majeure together with such evidence as LB
                reasonably can give and specifying the period for which it is
                estimated that such prevention or delay will continue, LB shall
                be excused from the performance or the punctual performance of
                such obligations as the case may be from the date of such notice
                for so long as such cause of prevention or delay shall continue.

        10.2    The expression "Force Majeure" shall be deemed to include any
                cause affecting the performance by LB of the Agreement arising
                from or attributable to acts, events, acts of God, omissions or
                accidents beyond the reasonable control of LB.

11.     Governing Law, Jurisdiction and Enforceability

        11.1    The construction, validity and performance of the Agreement
                shall be governed by the laws of England, to the jurisdiction of
                whose courts LB and the Customer submit.

        11.2    No failure or delay on the part of either LB or the Customer to
                exercise or enforce any rights conferred on it by the Agreement
                shall be construed or operate as a waiver thereof nor shall any
                single or partial exercise of any right, power or privilege or
                further exercise thereof operate so as to bar the exercise or
                enforcement thereof at any time or times thereafter.

        11.3    The illegality or invalidity of any provision (or any part
                thereof) of the Agreement or these Standard Terms shall not
                affect the legality, validity or enforceability of the remainder
                of its provisions or the other parts of such provision as the
                case may be.

12.     Miscellaneous

        12.1    Neither party shall be entitled to assign, transfer, charge or
                in any way make over the benefit and/or the burden of this
                Agreement without the prior written consent of the other which
                consent shall not be unreasonably withheld or delayed, save that
                either LB or the Customer shall respectively be entitled without
                the prior written consent of the other to assign, transfer,
                charge, sub-contract, deal with or



                                      -20-
<PAGE>   20

                in any other manner make over the benefit and/or burden of this
                Agreement to an Affiliate or to any 50/50 joint venture company
                of which either party is the beneficial owner or fifty per cent
                (50%) of the issued share capital thereof or to any company with
                which either party may merge or to any company to which that
                party may transfer its assets and undertakings.

        12.2    The text of any press release or other communication to be
                published by or in the media concerning the subject matter of
                the Agreement shall require the prior written approval of LB and
                the Customer.

        12.3    The Agreement embodies the entire understanding of LB and the
                Customer and there are no promises, terms, conditions or
                obligations, oral or written, expressed on implied, other than
                those contained in the Agreement. The terms of the Agreement
                shall supersede all previous agreements (if any) which may exist
                or have existed between LB and the Customer relating to the
                Services.



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