Document:

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                                                                    EXHIBIT 10.5

                              EMPLOYMENT AGREEMENT

        This Employment Agreement (this "Agreement"), dated as of April ____,
2001, and effective as of February 2, 2001 (the "Effective Date"), is made and
entered into by and between Northwest Biotherapeutics, Inc., a Delaware
corporation, (the "Company"), and Alton Lee Boynton (the "Executive").

        The Company and Executive hereby agree as follows:

1.      EMPLOYMENT

The Company will employ Executive and Executive will accept employment by the
Company as Vice President and Chief Scientific Officer. During Executive's
employment, Executive shall serve the Company faithfully and to the best of his
ability, devoting substantially all his working time, attention and energies to
the business of the Company, unless otherwise approved in writing by the Board
of Directors of the Company (the "Board"). Subject to the direction of the
Board, Executive will have such reasonable duties, responsibilities, powers and
authority as are prescribed by the Company's Chief Executive Officer. Executive
shall not engage in any other business activity (except the management of
personal investments, charitable and civic activities, and, upon completion of
an initial public offering of the Company's Common Stock, participation as a
director for companies that do not compete with the Company, that in the
aggregate do not interfere with the performance of Executive's duties) without
first obtaining the written consent of the Board, but such consent shall not
unreasonably be withheld.

2.      TERM OF AGREEMENT

The term of this Agreement ("Term") shall commence on February 2, 2001 and will
continue in effect until January 31, 2004, unless otherwise terminated as set
forth herein.

3.      COMPENSATION

        (a) BASE SALARY. Company shall pay Executive a base salary at an annual
rate of Two Hundred Sixty-Five Thousand Dollars ($265,000) payable in accordance
with Company's regular pay schedule for senior management. The Board shall
review Executive's salary and performance annually, and Executive shall be
eligible for an increase in his base salary based on such review. Upon the
successful completion of the Company's first firm commitment underwritten public
offering of its Common Stock registered under the Securities Act, Executive's
then-current base salary shall increase by 25%.

        (b) INCENTIVE COMPENSATION. Company shall establish an incentive
compensation plan and Executive shall participate in that plan. Within the first
90 days of each fiscal year, the Board and Executive shall discuss and agree on
financial and other performance objectives for Executive and Company for the
fiscal year. Executive shall receive an incentive compensation opportunity of up
to a maximum of 35% of his base salary based on his ability to meet these
objectives and as approved by the Board.

        (c) STOCK OPTIONS. The Company shall cause the Board to authorize the
issuance of non-qualified options to Executive to acquire shares of the
Company's common stock ("Shares"), under the following terms and conditions:

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               (1) Executive is granted an option to purchase Seventy-Nine
Thousand Three Hundred (79,300) Shares at an exercise price of $1.25 per Share.

               (2) Executive may, at his or the Company's option, pay for all or
any portion of the aggregate exercise price by delivering a combination of any
or all of the following:

                      (i) By delivering shares of the Company's common stock
        previously held by Executive which have a fair market value at the date
        of exercise equal to the aggregate exercise price to be paid by
        Executive upon such exercise. For purposes of this clause, the fair
        market value such shares is to be determined by the Board and shall be
        final and binding, provided that if the shares are publicly traded, the
        shares' fair market value shall be their average opening and closing
        prices on the date of exercise;

                      (ii) By delivering a properly executed exercise notice
        together with irrevocable instructions to a broker to promptly deliver
        to the Company the amount of sale or loan proceeds to pay the exercise
        price; or

                      (iii) By delivering a full recourse promissory note for
        all or part of the aggregate exercise price, payable on such terms and
        bearing such interest rate as determined by the Board (but in no event
        less than the minimum interest rate specified under the Internal Revenue
        Code at which no additional interest would be imputed and in no event
        more than the maximum interest rate allowed under applicable usury
        laws), which promissory note may be either secured or unsecured in such
        manner as the Board shall approve (including, without limitation, by a
        security interest in shares of the Company's stock).

               (3) The options shall vest in equal amounts monthly over 36
months; provided that, in the event the Company undergoes a change of control
("Change of Control") by virtue of a sale or exchange of shares in a transaction
or series of transactions occurring in any twelve-month period resulting in the
Company's stockholders as of the beginning of such twelve-month period holding
less than 50% of the outstanding equity and underlying options and warrants at
the end of such period, all of Executive's options shall become immediately
vested and fully exercisable upon such Change of Control.

               (4) The option term of Executive's vested options shall terminate
upon the first to occur of: (i) Executive's termination of employment with the
Company by Company for Cause (as such term is defined in Section 5(f)) or by
Executive without Good Reason (as such term is defined in Section 5(g)); or (ii)
ten years from the date the options are issued.

               (5) The Board will qualify the options for an exemption from
registration under the applicable federal and Washington State securities laws.

        (d)    BENEFITS.

               (1) Executive shall be entitled to receive a minimum of four
weeks paid vacation and all benefits (such as medical, dental, sick leave,
disability, and retirement benefits)

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as are generally available from time to time to employed senior executives of
Company. For purposes of this section, benefits offered to employees leased to
Company are not benefits under this section.

               (2) Company will maintain a reasonable policy of insurance for
directors and officers liability as determined by the Board. Executive will be
included within that policy of insurance with the premiums paid by Company.

4.      TERMINATION

Employment of Executive pursuant to this Agreement may be terminated as follows:

        (a) BY EXECUTIVE. Executive may terminate his employment at any time,
for any reason.

        (b) BY THE COMPANY. The Company may terminate the employment of
Executive at any time, for any reason, with or without cause.

        (c) AUTOMATIC TERMINATION. This Agreement and Executive's employment
shall terminate automatically upon the death or total disability of Executive.
The term "total disability" as used in this Agreement shall mean Executive's
inability to perform the duties set forth in Section 1 for a period or periods
aggregating one-hundred twenty (120) calendar days in any 12-month period as a
result of physical or mental illness, loss of legal capacity or any other cause
beyond Executive's control, unless Executive is granted a leave of absence by
the Board. Executive and the Company acknowledge that Executive's ability to
perform the duties specified in Section 1 is of the essence of this Agreement.

5.      TERMINATION PAYMENTS

In the event of termination of the employment of Executive, all compensation and
benefits set forth in this Agreement shall terminate, except as specifically
provided in this Section 5. For purposes of this Agreement, the effective date
of termination shall be thirty (30) days after the Executive or the Company
gives written notice of termination.

        (a) TERMINATION BY THE COMPANY WITH CAUSE. Upon termination by the
Company with Cause (as defined below), the Company shall pay Executive any
unpaid annual base salary, earned but unused vacation, and bonuses due (if any),
for services already performed (subject to normal withholding and other
deductions) to the effective date of termination of employment.

        (b) TERMINATION BY THE COMPANY WITHOUT CAUSE. Upon termination by the
Company without Cause (as defined below), the Company shall pay Executive any
unpaid annual base salary, any amount due but not paid under the Company's
Incentive Compensation Plan, earned but unused vacation and bonuses due (if any)
for services already performed (subject to normal withholding and other
deductions) to the effective date of termination of employment; and monthly
severance payments equivalent to six (6) months base salary and six (6) months
at one-half (1/2) base salary. These payments will be made in accordance with
the Company's customary payroll schedule, minus deductions required by law. The
Company will issue and file appropriate tax documents in connection with any
severance payments. Payment of

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the above-described severance compensation and benefits is conditioned on
Executive executing a full mutual release of all claims related to his
employment with or termination from Company in substantially the form attached
hereto as Exhibit A. Such a release will not include accrued and unpaid wages
and benefits, claims to industrial insurance, vested pension benefits or
indemnification rights. Executive will have the duty to mitigate the costs of
Company by attempting to obtain other employment within a reasonable time after
termination; Executive's compensation from such other employment will be
credited against the amounts due from Company to the extent the combined
compensation from Executive's new position and Company's payments under this
Section 5(b) would otherwise exceed Executive's base salary (or one-half (1/2)
base salary, as the case may be) with Company at the date of termination.

        (c) TERMINATION BY EXECUTIVE WITHOUT GOOD REASON. Upon termination by
Executive without Good Reason (as defined below), Executive shall be paid the
compensation as set forth in Section 5(a) and shall not be entitled to any other
benefits or payments.

        (d) TERMINATION BY EXECUTIVE WITH GOOD REASON. Upon termination by
Executive with Good Reason (as defined below), Executive shall receive the
compensation as set forth in Section 5(b) and shall not be entitled to any other
benefits or payments.

        (e) TERMINATION AS A RESULT OF DEATH OR TOTAL DISABILITY. In the event
of termination of Executive's employment pursuant to Section 4(c), Executive or
his estate shall be paid the compensation set forth in Section 5(a) and shall
not be entitled to any other benefits or payments.

        (f) DEFINITION OF "CAUSE." "Cause" as used in this Agreement shall mean
a determination by the Board that one or more of the following has occurred:

               willful misconduct, or dishonesty in the performance of
               Executive's duties that results in a material adverse effect on
               the Company;

               conviction of Executive of a felony involving an act of
               dishonesty, moral turpitude, deceit or fraud; or

               current use by the Executive of illegal substances.

        (g) DEFINITION OF "GOOD REASON." "Good reason" shall mean the occurrence
of any of the following events, without the consent of the Executive:

               a demotion or other material reduction in the nature or status of
               Executive's responsibilities; or"

               a material reduction in Executive's annual base salary or any
               failure by the Company to satisfy its duty to compensate the
               Executive as required under this Agreement.

6.      INTELLECTUAL PROPERTY

Company shall own all right, title and interest (including patent rights,
copyrights, trade secret rights, mask work rights, sui generis database rights
and all other intellectual rights of any sort

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throughout the world) relating to any and all inventions (whether or not
patentable), works of authorship, mask works, designs, know-how, ideas and
information made or conceived or reduced to practice, in whole or in part, by
Executive during the term of Executive's employment with Company to and only to
the fullest extent allowed by Washington Revised Code Annotated Section
49.44.140 (which is attached as Exhibit B) (collectively "Inventions") and
Executive will promptly disclose all Inventions to Company. Executive will also
disclose anything Executive believes is excluded by Section 49.44.140 so that
Company can make an independent assessment. Executive hereby makes all
assignments necessary to accomplish the foregoing. Executive shall further
assist Company, at Company's expense, to further evidence, record and perfect
such assignments, and to perfect, obtain, maintain, enforce, and defend any
rights specified to be so owned or assigned. Executive hereby irrevocably
designates and appoints Company as its agents and attorneys-in-fact to act for
and in Executive's behalf to execute and file any document and to do all other
lawfully permitted acts to further the purposes of the foregoing with the same
legal force and effect as if executed by Executive. If Executive wishes to
clarify that something created by Executive prior to Executive's employment that
relates to Company's actual or proposed business is not within the scope of this
Agreement, Executive has listed it on Exhibit C. If Executive uses or (except
where disclosed pursuant to this Section 6 as a claimed exclusion to RCW
49.44.140 or in Exhibit C) discloses Executive's own or any third party's
confidential information or intellectual property when acting within the scope
of Executive's employment or otherwise on behalf of Company, Company will have
and Executive hereby grants Company a perpetual, irrevocable, worldwide
royalty-free, non-exclusive, sublicensable right and license to exploit and
exercise all such confidential information and intellectual property rights. To
the extent allowed by law, this section includes all rights of paternity,
integrity, disclosure and withdrawal and any other rights that may be known as
or referred to as "moral rights," "artist's rights," "droit moral," or the like
(collectively "Moral Rights"). To the extent Executive retains any such Moral
Rights under applicable law, Executive hereby ratifies and consents to any
action that may be taken with respect to such Moral Rights by or authorized by
Company and agree not to assert any Moral Rights with respect thereto. Executive
will confirm any such ratifications, consents and agreements from time to time
as requested by Company.

7.      PRIVACY

Executive recognizes and agrees that Executive has no expectation of privacy
with respect to Company's telecommunications, networking or information
processing systems (including, without limitation, stored computer files, email
messages and voice messages) and that Executive's activity and any files or
messages on or using any of those systems may be monitored at any time without
notice.

8.      RESTRICTIVE COVENANTS

Executive acknowledges: (i) that Executive will have access during his
employment with Company to confidential information regarding all Inventions and
all other business, technical and financial information (including, without
limitation, the identity of and information relating to customers or employees)
Executive develops, learns or obtains during the term of Executive's employment
that relates to Company or the business or demonstrably anticipated business of
Company or that are received by or for Company in confidence, and that all such
information constitutes "Proprietary Information"; (ii) that information
regarding Proprietary Information

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constitutes a valuable asset and trade secret of Company; and (iii) that it is
reasonable for Company to protect itself from misappropriation of Proprietary
Information by Executive upon termination of employment or otherwise.
Accordingly, in consideration of employment hereunder, and other good and
valuable consideration, Executive agrees to the following nondisclosure,
noninterference and noncompetition covenants during the Term and for a period of
twenty-four (24) months after the Term:

        (a) NONDISCLOSURE. Executive will not copy, remove, or disclose any
Proprietary Information, except as may be required by law or in the course of
performing services for Company, Executive will hold in confidence and not
disclose or, except within the scope of Executive's employment, use any
Proprietary Information at any time, even after Executive's employment with
Company ends for whatever reason. However, Executive shall not be obligated
under this paragraph with respect to information Executive can document by clear
and convincing evidence is or becomes readily publicly available without
restriction through no fault of Executive. Upon termination of Executive's
employment or if sooner requested, Executive will promptly return to Company all
items containing or embodying Proprietary Information (including all copies),
except that Executive may keep Executive's personal copies of (i) Executive's
compensation records, (ii) materials distributed to shareholders generally and
(iii) this Agreement;

        (b) NONINTERFERENCE. Executive will not employ, solicit, or seek to
employ any person who is an employee of Company or its subsidiaries (i) as of
the date hereof; (ii) during the Term, or (iii) at the time of employment or
solicitation; and

        (c) NONCOMPETITION AND NONSOLICITATION. Executive will not, directly or
indirectly, as principal, agent, employee, officer, shareholder, consultant or
otherwise, engage in any business that competes directly with Company or any of
its subsidiaries, and will not solicit or aid in soliciting, endeavor to obtain
as a customer or client, accept sales, marketing, financial, or consulting
business from, or perform sales, marketing, consulting or related business for
any person, firm, corporation, association or other entity: (i) that is or was a
Company customer for whom Executive performed any services or with whom
Executive had maintained substantial business contacts at any time during the
Term; or (ii) whose business Executive solicited, either alone or in conjunction
with others, on behalf of Company or any of its subsidiaries during the Term.

        Executive acknowledges and agrees: (i) that a breach of any of the
covenants contained in this Section 8 would cause irreparable injury to Company
and its subsidiaries for which monetary damages alone would be inadequate to
compensate and protect Company and its subsidiaries; (ii) that Company and its
subsidiaries may therefore seek and obtain injunctive relief to enjoin any
breach of such restrictive covenants in addition to, and not in limitation of,
any other legal or equitable remedies that are available as a matter, of law or
equity; and (iii) that specific enforcement of this Agreement by way of an
injunction shall not prevent Executive from earning a reasonable livelihood.
EXECUTIVE FURTHER ACKNOWLEDGES AND AGREES THAT THE NONDISCLOSURE,
NONINTERFERENCE, NONCOMPETITION AND NONSOLICITATION COVENANTS CONTAINED HEREIN
ARE NECESSARY FOR THE PROTECTION OF COMPANY'S LEGITIMATE BUSINESS INTERESTS AND
ARE REASONABLE IN DURATION, GEOGRAPHIC SCOPE, AND OTHER CONTENT. However, in the
event a court of competent jurisdiction should decline to enforce any term of
the nondisclosure,

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noninterference, noncompetition or nonsolicitation covenants, as written herein,
such covenant shall be deemed to be modified to require confidentiality and
restrict Executive's interference, competition and solicitation with Company and
its subsidiaries to the maximum duration, geographic scope, and other content
that the court shall find enforceable.

9.      ASSIGNMENT

This Agreement is personal to Executive and shall not be assignable by
Executive. If the Company changes it name or changes a limited liability
corporation to another corporate form, this Agreement will remain in effect
between the Executive and the Company's successor. All the terms and provisions
of this Agreement shall be binding on and shall inure to the benefit of and be
enforceable by the parties and their respective successors and permitted
assigns.

10.     WAIVERS

No delay or failure by any party to this Agreement in exercising, protecting or
enforcing any of its rights, titles, interests or remedies hereunder, and no
course of dealing or performance with respect thereto, shall constitute a
waiver. The express waiver by a party of any right, title, interest or remedy in
a particular instance or circumstance shall not constitute a waiver in any other
instance or circumstance. All rights and remedies shall be cumulative and not
exclusive of any other rights or remedies.

11.     ARBITRATION

Any controversies or claims arising out of or relating to this Agreement shall
be fully and finally settled by arbitration in the city of Seattle, Washington
in accordance with the Employment Arbitration Rules of the American Arbitration
Association then in effect (the "AAA Rules"), conducted by one arbitrator either
mutually agreed upon by the Company and Executive or chosen in accordance with
the AAA Rules, except that the parties shall have any right to discovery as
would be permitted by the Federal Rules of Civil Procedure for a period of 90
days following the commencement of such arbitration, and the arbitrator shall
resolve any dispute that arises in connection with such discovery. Judgment upon
the award rendered by the arbitrator may be entered in any court having
jurisdiction.

12.     AMENDMENTS IN WRITING

No amendment, modification, waiver, termination or discharge of any provision of
this Employment Agreement, nor consent to any departure from any provision of
this Agreement by either party, shall in any event be effective unless the same
shall be in writing, specifically identifying this Agreement and the provision
intended to be amended, modified, waived, terminated or discharged and signed by
the Company and Executive, and each such amendment, modification, waiver,
termination or discharge shall be effective only in the specific instance and
for the specific purpose for which given. No provision of this Agreement shall
be varied, contradicted or explained by any oral agreement, course of dealing or
performance or any other matter not set forth in an agreement in writing and
signed by the Company and Executive.

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13.     APPLICABLE LAW

This Agreement shall in all respects, including all matters of construction,
validity and performance, be governed by, and construed and enforced in
accordance with, the laws of the state of Washington, without regard to any
rules governing conflicts of laws.

14.     SEVERABILITY

If any provision of this Agreement shall be held invalid, illegal or
unenforceable in any jurisdiction, for any reason, including, without
limitation, the duration of such provision, its geographical scope or the extent
of the activities prohibited or required by it, then, to the full extent
permitted by law (a) all other provisions shall remain in full force and effect
in such jurisdiction and shall be liberally construed in order to carry out the
intent of the parties as nearly as may be possible, (b) such invalidity,
illegality or unenforceability shall not affect the validity, legality or
enforceability of any other provision, and (c) any court or arbitrator having
jurisdiction shall have the power to reform such provision to the extent
necessary for such provision to be enforceable under applicable law.

15.     HEADINGS

All headings used in this Agreement are for convenience only and shall not in
any way affect the construction of, or be taken into consideration in
interpreting, this Agreement.

16.     COUNTERPARTS

This Agreement, and any amendment or modification entered into pursuant to
Section 12, may be executed in any number of counterparts, each of which
counterparts, when so executed and delivered, shall be deemed to be an original
and all of which counterparts, taken together, shall constitute one and the same
instrument.

17.     ENTIRE AGREEMENT

This Agreement between Executive and the Company (and any addenda, amendments or
extensions to those agreements) constitutes the entire agreement between the
Company and Executive with respect to the subject matters of this Agreement.

NORTHWEST BIOTHERAPEUTICS, INC.              EXECUTIVE:

By: __________________________________       ___________________________________
    Daniel O. Wilds, President & CEO         Alton Lee Boynton

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                                    EXHIBIT A

WAIVER AND RELEASE

For and in consideration of the severance payments and benefits set out in the
Employment Agreement attached hereto, Executive, on behalf of himself and his
agents, heirs, successors and assigns, expressly waives any claims against
Company and releases Company (including its officers, directors, stockholders,
managers, agents and representatives) from any and all claims, demands,
liabilities, damages, obligations, actions or causes of action of any kind,
known or unknown, past or present, arising out of, relating to, or in connection
with Executive's employment, termination of employment, or the holding of any
office with Company or any other related entity. The claims released by
Executive include, but are not limited to, claims for defamation, libel,
invasion of privacy, intentional or negligent infliction of emotional distress,
wrongful termination, constructive discharge, breach of contract, breach of the
covenant of good faith and fair dealing, breach of fiduciary duty, fraud, or for
violation of any federal, state or other governmental statute or ordinance,
including, without limitation, Title VII of the Civil Rights Act of 1964, the
federal Age Discrimination in Employment Act, the Americans with Disabilities
Act, the Family and Medical Leave Act, the Employment Retirement Income Security
Program or any other legal limitation on the employment relationship.

This waiver and release shall not waive or release claims (1) where the events
in dispute first arise after execution of this Release; (2) for rights or
benefits due under the Employment Agreement attached hereto; or (3) relating to
Executive's rights to indemnity as a corporate officer of Company.

Executive agrees he has been provided the opportunity to consider whether to
enter into this Release, and has voluntarily chosen to enter into it on this
date. This Release shall be effective when signed. Executive acknowledges that
he is voluntarily executing this Release, that he has carefully read and fully
understands all aspects of this Release and the attached Employment Agreement,
that he has not relied upon any representations or statements not set forth
herein or made by Company's agents or representatives, that he has been advised
to consult with an attorney prior to executing the Release, and that, in fact,
he has consulted with an attorney of his choice as to the subject matter and
effect of this Release.

_________________________               ____________________________________
Date                                    Executive

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                                    EXHIBIT B

               WASHINGTON REVISED CODE ANNOTATED SECTION 49.44.140

Washington Revised Code Annotated Section 49.44.140 provides as follows:

        A provision in an employment agreement that provides that an employee
        shall assign or offer to assign any of the employee's rights in an
        invention to the employer does not apply to an invention for which no
        equipment, supplies, facilities, or trade secret information of the
        employer was used and that was developed entirely on the employee's own
        time, unless:

        (a)    the invention relates (i) directly to the business of the
        employer, or (ii) to the employer's actual or demonstrably anticipated
        research or development, or

        (b)    the invention results from any work performed by the employee for
        the employer.

        Any provision that purports to apply to such an invention is to that
        extent against the public policy of this state and is to that extent
        unenforceable.

        An employer shall not require a provision made void and unenforceable by
        subsection (a) of this section as a condition of employment or
        continuing employment.

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                                    EXHIBIT C

        None.<PAGE>   1
                                                                    Exhibit 10.6

                                      LEASE

                              NEXUS CANYON PARK LLC
                                   "LANDLORD"

                                       AND

                         NORTHWEST BIOTHERAPEUTICS, INC.
                                    "TENANT"

                  21720 - 23RD DRIVE S.E., BOTHELL, WASHINGTON

<PAGE>   2

                                      LEASE

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                          Page
                                                                                          ----
<S>     <C>                                                                               <C>
1.      Lease Premises.......................................................................1
2.      Basic Lease Provisions...............................................................1
3.      Term.................................................................................3
4.      Construction and Possession..........................................................3
5.      Rent.................................................................................6
6.      Rental Adjustments...................................................................6
7.      Operating Expenses...................................................................7
8.      Rentable Area.......................................................................10
9.      Security Deposit....................................................................11
10.     Use.................................................................................14
11.     Brokers.............................................................................15
12.     Holding Over........................................................................16
13.     Taxes on Tenant's Property..........................................................16
14.     Condition of Premises...............................................................17
15.     Common Areas and Parking Facilities.................................................17
16.     Utilities and Services..............................................................18
17.     Alterations.........................................................................19
18.     Repairs and Maintenance.............................................................20
19.     Liens...............................................................................20
20.     Indemnification and Exculpation.....................................................21
21.     Insurance - Waiver of Subrogation...................................................22
22.     Damage or Destruction...............................................................25
23.     Eminent Domain......................................................................26
24.     Defaults and Remedies...............................................................27
25.     Assignment or Subletting............................................................31
26.     Attorney's Fees.....................................................................32
27.     Bankruptcy..........................................................................33
28.     Definition of Landlord..............................................................33
29.     Estoppel Certificate................................................................34
30.     Removal of Property.................................................................34
31.     Limitation of Landlord's Liability..................................................35
32.     Control by Landlord.................................................................36
33.     Quiet Enjoyment.....................................................................36
34.     Quitclaim Deed......................................................................36
35.     Subordination and Attornment........................................................36
36.     Surrender...........................................................................37
37.     Waiver and Modification.............................................................37
38.     Waiver of Jury Trial................................................................37
39.     Hazardous Material..................................................................37
40.     Option to Extend Term...............................................................41
</TABLE>

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<TABLE>
<CAPTION>
                                                                                          Page
                                                                                          ----
<S>     <C>                                                                               <C>
41.     Right of First Refusal to Lease Additional Space....................................42
42.     Miscellaneous.......................................................................43

        42.1   Terms and Headings...........................................................43
        42.2   Examination of Lease.........................................................44
        42.3   Time.........................................................................44
        42.4   Covenants and Conditions.....................................................44
        42.5   Consents.....................................................................44
        42.6   Entire Agreement.............................................................44
        42.7   Severability.................................................................44
        42.8   Recording....................................................................44
        42.9   Impartial Construction.......................................................44
        42.10  Inurement....................................................................44
        42.11  Force Majeure................................................................44
        42.12  Notices......................................................................45
        42.13  Authority to Execute Lease...................................................45
        42.14  Governing Law................................................................45

43.     Definitions.........................................................................45

        43.1   Premises.....................................................................45
        43.2   Site Improvements............................................................45
        43.3   Site Plan....................................................................45
        43.4   Building.....................................................................45
        43.5   Building Shell...............................................................45
        43.6   Tenant Improvements..........................................................45
        43.7   Tenant Improvement Plans.....................................................45
        43.8   Project......................................................................45
        43.9   Tenant Improvement Allowance.................................................46

EXHIBIT "A"     Site Plan of the Project
EXHIBIT "B"     Outline of the Premises
EXHIBIT "C"     Description of Landlord Improvements
EXHIBIT "D"     Form of Letter of Credit
EXHIBIT "E"     Rules and Regulations
EXHIBIT "F"     Calculation of Rentable Area
</TABLE>

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                                      LEASE

                        (Nexus/Northwest Biotherapeutics)

        THIS LEASE ("Lease") is made as of October 22, 1999, by and between
Nexus Canyon Park LLC, a California limited liability company ("Landlord"), and
Northwest Biotherapeutics, Inc., a Delaware corporation ("Tenant").

1.      LEASE PREMISES.

        1.1 Landlord hereby leases to Tenant and Tenant hereby leases from
Landlord those certain premises ("Premises") consisting of approximately 38,776
square feet of Rentable Area in the building (the "Building") located at
21720-23rd Drive S.E., Bothell, Washington, on real property legally described
as Tract 21-B of Canyon Park Business Center Binding Site Plan recorded under
Recording No. 9708195005, records of Snohomish County, Washington, being a
portion of the Northwest Quarter of Section 29, Township 27 North, Range 5 East,
W.M. The Building consists of approximately 112,000 square feet of Rentable
Area. The Building, the real property upon which the Building is located, and
all landscaping, parking facilities, and other improvements and appurtenances
related thereto are hereinafter collectively referred to as the "Project." The
site plan for the Project is attached hereto as Exhibit "A", and the Premises
are outlined on Exhibit "B." All portions of the Project which are for the
non-exclusive use of tenants of the Project, including without limitation
roadways, driveways, sidewalks, parking areas, and landscaped areas, are
hereinafter referred to as "Common Areas".

2.      BASIC LEASE PROVISIONS.

        2.1 For convenience of the parties, certain basic provisions of this
Lease are set forth herein, which provisions are subject to the remaining terms
and conditions of this Lease and are to be interpreted in light of such
remaining terms and conditions.

             2.1.1  Address of the Project:
                    21720-23rd Drive S.E.
                    Bothell, Washington

             2.1.2  Designation of Tenant's Suite:
                    Suite 100

             2.1.3  Rentable Area:
                    Approximately 38,776 square feet

             2.1.4  Basic Annual Rent: $1,062,074.64 ($27.39 per square foot
                    per year of Rentable Area, subject to adjustment pursuant
                    to Sections 6.1 and 8.3)

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<PAGE>   5

             2.1.5  Monthly Installment of Basic Annual Rent: $88,506.22
                    ($2.2825 per square foot per month of Rentable Area,
                    subject to adjustment pursuant to Sections 6.1 and 8.3)

             2.1.6  Tenant's Pro Rata Share: 34.6% of the Project (subject to
                    adjustment pursuant to Section 8.3)

             2.1.7  (a) Estimated Term Commencement Date: July 1, 2000 (to be
                        determined pursuant to Section 3.2)

                    (b) Term Expiration Date: Ten (10) years from the actual
                        Term Commencement Date

             2.1.8  Security Deposit: $1,003,968 Letter of Credit

             2.1.9  Permitted Use:

                     Office, research and development, laboratory,
                     manufacturing, distribution, and any other lawful use
                     permitted in the applicable zone

             2.1.10 Address for Rent Payment and Notices to Landlord:

                    Nexus Canyon Park LLC
                    4350 La Jolla Village Drive, Suite 930
                    San Diego, CA 92122
                    Attn:  Michael J. Reidy

                    Address for Notices to Tenant Prior to Occupancy:

                    Northwest Biotherapeutics, Inc.
                    125 Northgate Plaza
                    Seattle, WA 98125
                    Attn:  Chief Executive Officer

                    Address for Notices to Tenant After Occupancy:

                    Northwest Biotherapeutics, Inc.
                    21720-23rd Drive S.E.
                    Bothell, WA
                    Attn:  Chief Executive Officer

                                        2
<PAGE>   6

        2.2 The following exhibits are attached hereto and incorporated herein
by this reference:

               Exhibit "A" Site Plan of the Project
               Exhibit "B" Outline of the Premises
               Exhibit "C" Description of Landlord Improvements
               Exhibit "D" Form of Letter of Credit
               Exhibit "E" Rules and Regulations
               Exhibit "F" Calculation of Rentable Area

        2.3 Capitalized terms not defined when first used in this Lease shall
have the meaning ascribed to them in Article 43 below.

3.      TERM.

        3.1 This Lease shall take effect upon the date of execution hereof by
each of the parties hereto, and each of the provisions hereof shall be binding
upon and inure to the benefit of Landlord and Tenant from the date of execution
hereof by each of the parties hereto.

        3.2 The term of this Lease will be that period from the date Tenant
commences conduct of its business on the Premises after the completion of Tenant
Improvements or July 1, 2000, whichever is earlier ("Term Commencement Date"),
and through ten (10) years from the Term Commencement Date, subject to earlier
termination of this Lease or extension of the term as provided herein. The
target date set forth in the preceding sentence is based on the assumption that
the Premises will be tendered for construction of the Tenant Improvements by
February 1, 2000. If the Premises are tendered to Tenant after February 1, 2000,
the target date of July 1, 2000 shall be extended by one day for each day of
delay beyond February 1, 2000.

        3.3 The parties acknowledge that as of the date of execution hereof,
Landlord does not own the Project, but has entered into a purchase and sale
agreement dated August 9, 1999 ("Purchase and Sale Agreement") with Opus
Northwest, L.L.C., for the purchase of the Project. Accordingly, the
effectiveness of this Lease is contingent upon (i) Landlord acquiring fee simple
title to the Project in accordance with the Purchase Agreement, and (ii)
Landlord certifying to Tenant in writing that Landlord has acquired the Project
and delivering copies of the recorded deed to verify the closing under the
Purchase Agreement has occurred. If the conditions in this Section 3.3 are not
satisfied on or before November 30, 1999, then either Landlord or Tenant may
terminate this Lease upon written notice to the other within fifteen (15) days
thereafter (but in any event prior to the date the conditions are satisfied), in
which event Landlord shall immediately reimburse Tenant the reasonable
out-of-pocket expenses incurred by Tenant in designing and planning for the
Premises and in negotiating and entering into this Lease.

4.      CONSTRUCTION AND POSSESSION.

        4.1 Commencing promptly after Landlord acquires the Project, Landlord
shall construct at Landlord's expense, and in compliance with the warranties set
forth in Article 14, the following improvements to the Building, and such other
improvements as are described on

                                        3
<PAGE>   7

Exhibit "C" ("Landlord Improvements"): (a) removal of the existing mezzanine and
construction of a new mezzanine with a loading capacity of 125 lbs/square foot
and two exit stairwells; (b) roof penetrations and structural reinforcement of
the roof sufficient to support standard biotech rooftop loads; (c) the addition
of one elevator sufficient to carry both freight and passengers; (d) removal of
the existing dock loading bays and "squaring out" of the back wall of the
Premises; (e) the addition of new exterior windows along the south and west
walls of the Building; and (f) construction of a retaining wall on the south end
of the Building.

        4.2 At such time as Landlord has completed the Landlord Improvements to
the extent that construction of the Tenant Improvements can commence, Tenant
shall construct the Tenant Improvements in accordance with the Tenant
Improvement Plans at Tenant's expense, including the expense of design,
permitting and construction, subject to Landlord providing the Tenant
Improvement Allowance described in Section 4.3 below; provided, however,
Landlord will reimburse Tenant for one-half of the expense of constructing the
demising wall separating the Premises from other tenant space in the Building.
In that part of the Premises to be left in "shell" condition pursuant to the
Tenant Improvement Plans, which shall consist of no more than 5,200 square feet
of Rentable Area, Tenant shall install at a minimum the mechanical equipment for
the anticipated future load capacity of the space (but not the duct work and
distribution system), a fully operational fire sprinkler system, a demising wall
to separate the "shell" space from the balance of the Premises, and lighting,
exiting and other improvements required by applicable law for health and safety
reasons. The Tenant Improvement Plans, and any revisions and supplements
thereto, shall be subject to the approval of Landlord, which approval shall not
be unreasonably withheld or delayed (and shall be deemed approved if Landlord
does not respond to a request for approval within ten (10) days after the
request). Tenant shall obtain and provide to Landlord a certificate of occupancy
as soon as possible after completion of the Tenant Improvements.

        4.3 Landlord shall contribute for the cost of Tenant Improvements the
amount of $3,489,400 ($89.9886 per square foot of Rentable Area) (the "Tenant
Improvement Allowance").

               (a) Tenant shall prepare a Tenant Improvement budget equal to the
Tenant Improvement Allowance ("Tenant Improvement Budget"), including design
fees, architect fees and other direct costs incurred in the design and
construction of the Tenant Improvements. The Tenant Improvement Budget, and all
revisions thereto, shall be subject to Landlord's approval, which shall not be
unreasonably withheld or delayed. As work progresses on the Tenant Improvements,
Tenant shall submit an application for payment ("Application for Payment") to
Landlord no more often than monthly, and by the twentieth (20th) day of the
month, for disbursement of the Tenant Improvement Allowance. Applications for
Payment may be made only for work actually completed or services actually
provided and shall include a detailed description of such completed Tenant
Improvement work or services. Applications for Payment shall include copies of
the invoices to Tenant by Tenant's contractor(s) or other vendors for the work
completed. As a condition of payment of any Application for Payment, Landlord
may require the certification by both Tenant and Tenant's architect that the
described Tenant Improvement Work or services have been completed. Landlord
shall disburse the requested funds from the Tenant Improvement Allowance
directly to the invoicing party (or, in Landlord's

                                        4
<PAGE>   8

discretion, directly to Tenant) no later than the tenth (10th) day of each
calendar month for Applications for Payment with required supporting
documentation received on or before the twentieth (20th) day of the previous
calendar month. Tenant agrees to reasonably cooperate with Landlord in compiling
the Applications for Payment in form and content satisfactory to Landlord's
construction lender.

               (b) If the work described on the Tenant Improvement Budget, as it
may be revised from time to time, exceeds the amount of the Tenant Improvement
Allowance, because of changes in work, cost overruns, or otherwise, Tenant shall
pay the overage on a monthly basis as the work progresses.

               (c) Tenant shall, at its expense, install any improvements in
addition to those listed on the Tenant Improvement Budget which are necessary to
ensure (i) the Premises are completed in accordance with the Tenant Improvement
Plans, (ii) the Premises are fully operational, and (iii) a certificate of
occupancy is issued for the Premises. Tenant may lease or finance the
acquisition of any personal property components of the additional improvements,
such as fixtures and equipment for specialized clean rooms and communications,
computer and security systems. Landlord shall cooperate with Tenant and any
equipment lessor or lender to document an ownership or security interest in such
personal property for the lease or loan, as the case may be.

        4.4 Landlord shall tender possession of the Premises to Tenant for
construction of the Tenant Improvements at such time as Landlord and Landlord's
Architect gives Tenant written notice that construction of the Landlord
Improvements has progressed to the point that construction of the Tenant
Improvements can commence. Tenant agrees that in the event possession of the
Premises is not promptly tendered to Tenant, this Lease shall not be void or
voidable and Landlord shall not be liable to Tenant for any loss or damage
resulting therefrom. Without limiting the generality of the foregoing, Tenant
expressly waives any right to terminate this Lease because of delays in
completion of construction of the Premises; provided, however, if possession of
the Premises is not tendered to Tenant for construction of the Tenant
Improvements by May 1, 2000, Tenant may upon written notice to Landlord within
thirty (30) days thereafter terminate this Lease.

        4.5 Tenant understands that the Site Improvements, Building Shell and
Landlord Improvements may not be complete at the time possession of the Premises
is tendered to Tenant for construction of the Tenant Improvements, but will be
in a condition such that construction of the Tenant Improvements can commence.
Landlord shall fully complete construction of the Site Improvements, Building
Shell and the Landlord Improvements no later than the date Tenant completes
construction of the Tenant Improvements. In the event that the Site
Improvements, Building Shell and Landlord Improvements are not fully completed
by the date Tenant completes the Tenant Improvements, neither the term of this
Lease nor Tenant's obligation to pay Rent shall commence until the date a
certificate of occupancy for the Premises would have been issued but for such
delay.

        4.6 Landlord and Tenant shall diligently and in good faith cooperate
with one another, and shall cause their architects and contractors to cooperate
with one another, to insure

                                        5
<PAGE>   9

timely and cost effective design, permitting and construction of the Site
Improvements, Building Shell, and Tenant Improvements.

        4.7 Any dispute between Landlord and Tenant arising under this Article 4
that is not resolved by the parties within fifteen (15) days shall be promptly
resolved by binding arbitration conducted by a single neutral arbitrator in
Seattle, Washington, under the Commercial Rules of the American Arbitration
Association. In order that completion of the Project is not delayed, the party
responsible for construction or other performance shall continue to perform
pending completion of the arbitration proceeding. In the event of delays caused
by Landlord, in failing to reasonably approve the Tenant Improvement Plans or
otherwise, the Term Commencement Date and Tenant's obligation to pay Rent shall
be extended one day for each day of such delay as determined by agreement of the
parties or by the arbitrator if they fail to agree.

5.      RENT.

        5.1 Tenant agrees to pay Landlord as Basic Annual Rent for the Premises
the sum set forth in Section 2.1.4, subject to adjustment as set forth in
Sections 6.1 and 8.3, commencing on the Term Commencement Date. Basic Annual
Rent shall be paid in the equal monthly installments set forth in Section 2.1.5,
subject to adjustment as set forth in Sections 6.1 and 8.3, each in advance on
the first day of each and every calendar month during the term of this Lease,
commencing on the Term Commencement Date.

        5.2 In addition to Basic Annual Rent, Tenant agrees to pay to Landlord
as additional rent ("Additional Rent"), at the times hereinafter specified in
this Lease (i) Tenant's Pro Rata Share (as defined in Section 7.3(a) and as set
forth in Section 2.1.6, subject to adjustment pursuant to Section 8.3) of
Operating Expenses as provided in Section 7 and (ii) all other amounts that
Tenant assumes or agrees to pay under the provisions of this Lease, including
but not limited to any and all other sums that may become due by reason of any
default of Tenant or failure on Tenant's part to comply with the agreements,
terms, covenants and conditions of this Lease to be performed by Tenant.

        5.3 Basic Annual Rent and Additional Rent shall together be denominated
"Rent." Except as expressly set forth in this Lease, Rent shall be paid to
Landlord, without notice, demand, abatement, suspension, deduction, setoff,
counterclaim, or defense, in lawful money of the United States of America, at
the office of Landlord as set forth in Section 2.1.10 or to such other person or
at such other place as Landlord may from time to time designate in writing.

        5.4 In the event the term of this Lease commences or ends on a day other
than the first day of a calendar month, then the Rent for such fraction of a
month shall be prorated for such period on the basis of a thirty (30) day month
and shall be paid at the then current rate for such fractional month prior to
the commencement of the partial month.

6.      RENTAL ADJUSTMENTS.

        6.1 Commencing on the first anniversary of the Term Commencement Date,
the Basic Annual Rent then in effect (and as previously increased pursuant to
this Section 6.1) shall be

                                        6
<PAGE>   10
increased each year by three and one-half percent (3.5%) on each annual
anniversary of the Term Commencement Date for the initial 10-year term of the
Lease.

7.      OPERATING EXPENSES.

         7.1 As used herein, the term "Operating Expenses" shall include:

               (a) Government impositions including, without limitation, real
and personal property taxes and assessments (but excluding personal property
taxes and assessments of other tenants of the Project) levied upon the Project
or any part thereof; amounts due under any improvement bond upon the Project and
assessments levied in lieu thereof (except to the extent they represent costs
related to the construction of the Project); any tax on or measured by gross
rentals received from the rental of space in the Project or tax based on the
square footage of the buildings in the Project to the extent such tax is in lieu
of or in the nature of a property tax; and any utilities surcharges or any other
costs levied, assessed or imposed by, or at the direction of, or resulting from
statutes or regulations, or interpretations thereof promulgated by, any federal,
state, regional, municipal or local government authority in connection with the
use or occupancy of the Building or Project, and any expenses, including the
cost of attorneys or experts, reasonably incurred by Landlord in seeking
reduction by the taxing authority of the applicable taxes not to exceed the
amount of any such reduction, less tax refunds obtained as a result of an
application for review thereof.

               (b) Except as set forth in Section 7.2 below, all other costs
paid or incurred by Landlord which, in accordance with accepted principles of
sound accounting practice as applied to the operation and maintenance of first
class buildings, are properly chargeable to the maintenance and operation of the
Project including, by way of examples and not as a limitation upon the
generality of the foregoing, costs of (i) maintenance, repairs and replacements
to improvements within the Project as appropriate to maintain the Project in
first class condition; (ii) utilities furnished to the Project (except those
utilities which are separately metered and paid by individual tenants); (iii)
sewer fees; (iv) trash collection; (v) cleaning (including windows, but
excluding janitorial costs, which will be contracted for directly by Tenant);
(vi) maintenance of landscape and grounds; (vii) maintenance of drives and
parking areas, including periodic resurfacing; (viii) reasonable and customary
security services, if any; (ix) maintenance, repair, and replacement of
reasonable and customary security devices; (x) building supplies; (xi)
maintenance, repair, and replacement of equipment utilized for operation and
maintenance of the Project; (xii) costs of maintenance, repairs and replacements
of mechanical, plumbing, electrical and other systems which are part of the
Building Shell; (xiii) insurance premiums; (xiv) insurance deductibles and other
portions of insured losses attributable to Tenant Improvements deductible by
reason of insurance policy terms; (xv) service contracts for work of a nature
before referenced; (xvi) costs of services of independent contractors retained
to do work of nature before referenced at reasonable and customary rates; (xvii)
costs of compensation (including employment taxes and fringe benefits) of all
persons who perform regular and recurring duties connected with the day-to-day
operation and maintenance of the Project at reasonable and customary rates; and
(xviii) costs of management services equal to two and three fourths percent (2
3/4%) of Basic Annual Rent for the first five years of the term, and two and

                                        7
<PAGE>   11

one-half percent (2 1/2%) of Basic Annual Rent for the balance of the term,
including any extended term.

        7.2 Notwithstanding the foregoing, Operating Expenses shall not include,
and Tenant shall not be responsible for the payment of, the following costs and
expenses:

               (a) costs incurred for the initial construction of the Project,
except for the costs of the Tenant Improvements in excess of the Tenant
Improvement Allowance;

               (b) costs incurred for the repair, maintenance or replacement of
the structural components of the footings, foundation, ground floor slab, and
load bearing walls of the buildings in the Project (but excluding painting and
ordinary maintenance and repair of exterior surfaces, which are Operating
Expenses under Section 7.1(b));

               (c) costs of a capital nature, as defined by generally accepted
accounting principles, incurred for the replacement of all other components of
the Site Improvements and Building Shell, except to the extent caused by
Tenant's negligence;

               (d) costs incurred to correct any defects in design, materials or
construction of the Project other than the Tenant Improvements, and to comply
with Landlord's warranties set forth in Sections 14.1 and 14.2;

               (e) costs, expenses and penalties (including without limitation
attorneys fees) incurred as a result of the use, storage, removal or remediation
of any toxic or hazardous substances or other environmental contamination not
caused by Tenant or its employees, contractors, agents, representatives, or
invitees;

               (f) rentals and other payments by Landlord under any ground lease
or other lease underlying the Lease, and interest, principal, points and other
fees on debt or amortization of any debt secured in whole or part by all or any
portion of the Project (provided that interest upon a government assessment or
improvement bond payable in installments is an Operating Expense under Section
7.1(a));

               (g) costs incurred in connection with the financing, sale or
acquisition of the Project or any portion thereof;

               (h) costs, expenses, and penalties (including without limitation
attorneys' fees) incurred due to the violation by Landlord of any underlying
deed of trust, mortgage or ground lease affecting the Project or any portion
thereof,

               (i) depreciation and amortization of any type (provided this
exclusion is not intended to delete from Operating Expenses actual costs of
maintenance, repairs and replacements which are otherwise included within
Operating Expenses);

               (j) any costs incurred as a result of Landlord's violation of any
statute, ordinance or other source of applicable law, or breach of contract or
tort liability to any other

                                        8
<PAGE>   12

party, including without limitation, any unrelated third party, or Landlord's
employees, contractors, agents or representatives;

               (k) costs incurred in leasing or procuring tenants or removing
other tenants (including, without limitation, lease commissions, advertising
expenses, design costs, attorneys' fees and expenses of renovating space for
tenants);

               (1) advertising, marketing, media and promotional expenditures
regarding the Project and costs of signs identifying the owner, lender or any
contractor thereof,

               (m) any fees or salaries of the principals of Landlord;

               (n) any rentals and related expenses incurred in leasing
equipment which may be classified as capital expenditures under generally
accepted accounting principles;

               (o) any net income, franchise, capital stock, estate or
inheritance taxes or taxes which are the personal obligation of Landlord or of
another tenant of the Project;

               (p) expenses which relate to preparation of rental space for a
tenant;

               (q) legal expenses arising out of the initial construction of the
Project or any tenant improvements or for the enforcement of the provisions of
any tenant leases other than this Lease;

               (r) the cost of any work or service performed for or facilities
furnished to a tenant at such tenant's cost;

               (s) any interest or penalties imposed upon Landlord by any taxing
authority for late payment or otherwise;

               (t) Landlord's general overhead and any other expenses not
directly related to the Building or Project;

               (u) Janitorial costs, which shall be contracted for directly by
Tenant; and

               (v) any other expense otherwise chargeable as part of the cost of
operation and maintenance but which is not of general benefit to the Project but
is primarily for the benefit of one or more specific tenants.

        7.3 Commencing on the Term Commencement Date, Tenant shall pay to
Landlord on the first day of each calendar month of the term of this lease, as
Additional Rent, Landlord's good faith estimate of Tenant's Pro Rata Share (as
set forth in Section 2.1.6) of Operating Expenses with respect to the Project
for such month.

                                        9
<PAGE>   13

               (a) "Tenant's Pro Rata Share" under this Lease shall mean a
percentage determined by dividing the Rentable Area of the Premises by the total
Rentable Area of the Project, as set forth in Section 2.1.6, subject to
adjustment pursuant to Section 8.3.

               (b) Within sixty (60) days after the conclusion of each calendar
year, Landlord shall furnish to Tenant a statement (the "Annual Operating
Expense Statement") showing in reasonable detail the actual Operating Expenses
and Tenant's Pro Rata Share of Operating Expenses for the previous calendar
year. Any additional sum due from Tenant to Landlord shall be due and payable
within thirty (30) days of Tenant's receipt of such statement. If the estimated
amounts paid by Tenant pursuant to this Section 7.3 exceed Tenant's Pro Rata
Share of the actual Operating Expenses for the previous calendar year, the
difference shall be credited by Landlord against the Rent next due and owing
from Tenant; provided that, if the Lease term has expired, Landlord shall
accompany said statement with payment for the amount of such difference.

               (c) Any amount due under this Section 7.3 for any period which is
less than a full month shall be prorated for such fractional month on the basis
of a thirty (30) day month.

               (d) Notwithstanding this Section 7.3, Operating Expenses which
can fairly and reasonably be allocated to one or more tenants rather than to all
tenants of the Project shall be so allocated, and shall be separately scheduled
on the Annual Operating Expense Statement.

        7.4 Tenant shall have the right, at Tenant's expense, upon reasonable
notice during reasonable business hours, to inspect that portion of Landlord's
books which are relevant to preparation of the Annual Operating Expense
Statement provided any request for such review shall be furnished within one
hundred eighty (180) days after Tenant's receipt of such statement as to a prior
year's Operating Expenses. If, as a result of Tenant's inspection of Landlord's
books, it is determined that Landlord has overstated Operating Expenses by five
percent (5%) or more, then Landlord shall pay Tenant's out-of-pocket costs
incurred in connection with such inspection.

        7.5 Operating Expenses for the calendar year in which Tenant's
obligation to pay them commences and in the calendar year in which such
obligation ceases shall be prorated. Expenses such as taxes, assessments and
insurance premiums which are incurred for an extended time period shall be
prorated based upon time periods to which applicable so that the amounts
attributed to the Premises relate in a reasonable manner to the time period
wherein Tenant has an obligation to pay Operating Expenses.

8.      RENTABLE AREA.

        8.1 The Rentable Area of the Project is determined by making separate
calculations of the Rentable Area of each floor of all buildings and totaling
the Rentable Area of all floors within the buildings. The Rentable Area of a
floor is calculated by measuring to the outside finished surface of each
permanent outer building wall where it intersects the floor, or where it would
have intersected the floor except for recessed entryways, windows and the like
(also known as the "drip line", measured from where the outside finished surface
of the second floor

                                       10
<PAGE>   14

wall intersects the roof). The full area calculated as set forth above is
included as Rentable Area of the Project without deduction for (i) columns or
projections, (ii) vertical penetrations including stairs, elevator shafts,
flues, pipe shafts, vertical ducts, and the like, and their enclosing walls,
(iii) corridors, equipment rooms, rest rooms, entrance ways, elevator lobbies,
and the like, and their enclosing walls, and (iv) any other unusable area of any
nature.

        8.2 The term "Rentable Area" when applied to Tenant is the approximate
area to be occupied by Tenant plus an equitable allocation of Rentable Area
within the Project which is not then utilized or expected to be utilized by
Tenant or other tenants of the Project, including but not limited to the
portions of the buildings devoted to fire exit corridors, stairwells, and
equipment rooms (but shall not include one-half of the area occupied by the
smaller stairwell in the Premises). In making such allocations, consideration
will be given to tenants benefited by space allocated such that areas which
primarily serve tenants of only one floor, such as corridors and rest rooms upon
such floor, shall be allocated to that tenant's Rentable Area. If the Premises
are separated from space occupied by another tenant, the Rentable Area shall be
measured to the center of any interior demising walls.

        8.3 The Rentable Area as set forth in Section 2.1.3 and reflected on
Exhibit "F" is an estimate of the area which constitutes the Rentable Area of
the Premises, which, at the request of either Landlord or Tenant made within
ninety (90) days after the Term Commencement Date, shall be adjusted in
accordance with measurement and certification of the Project architect. If the
Rentable Area as determined hereunder is more or less than the Rentable Area set
forth in Section 2.1.3, Basic Annual Rent, monthly installments of Basic Annual
Rent, and the Tenant Improvement Allowance shall be adjusted upward or downward,
as the case may be, based on the actual Rentable Area of the Premises. Rentable
Area as adjusted shall also be utilized for computation of Tenant's Pro Rata
Share of Operating Expenses among tenants of the Project.

        8.4 In the event Landlord expands the Building, Landlord will promptly
have its architect measure and certify to Tenant the rentable area of any such
expansion, in which case Tenant's Pro Rata Share shall be adjusted, but in no
event shall Tenant's Pro Rata Share be increased by any such expansion, or for
any other reason other than measurement of the Premises pursuant to Section 8.3,
without Tenant's prior written consent.

9.      SECURITY DEPOSIT.

        9.1 Within thirty (30) days after the execution of this Lease, Tenant
shall deposit with Landlord an irrevocable stand-by letter of credit in
substantially the form of Exhibit "D" ("Letter of Credit"), or grant to Landlord
a security interest in a certificate of deposit in a form reasonably acceptable
to Landlord ("Certificate of Deposit"), in favor of Landlord in the principal
amount of $1,003,968, to be held by Landlord as security for the faithful
performance by Tenant of all of the terms, covenants, and conditions of this
Lease to be kept and performed by Tenant during the term and any extension term
hereof. If Tenant defaults with respect to any provision of this Lease,
including but not limited to any provision relating to the payment of Rent, and
subject to any notice requirements and cure periods for Tenant's benefit set
forth in Article 24, Landlord may (but shall not be required to) draw from the
Letter of Credit the amount required to cure the default, or foreclose on and
take possession of the Certificate of Deposit, and to use, apply or

                                       11
<PAGE>   15

retain the proceeds thereof for the payment of any Rent or any other sum in
default, or to compensate Landlord for any other loss or damage which Landlord
may suffer by reason of Tenant's default.

        9.2 At the commencement of the sixth year of the term the amount of the
Letter of Credit or Certificate of Deposit shall be reduced to $752,976, on the
conditions that (i) Tenant is not then in default, (ii) Tenant has not been in
default under Section 24.4(a) on more than three (3) separate occasions for
failure to make a payment of Rent, and (iii) Tenant then has cash on hand,
including cash equivalents and marketable securities, in an amount in excess of
Tenant's net loss, as determined under generally accepted accounting principles,
for the combined two (2) most recent calendar years.

        9.3 At the commencement of the eighth year of the term the amount of the
Letter of Credit or Certificate of Deposit shall be reduced to $501,984, on the
conditions that (i) Tenant is not then in default, (ii) Tenant has not been in
default under Section 24.4(a) on more than three (3) separate occasions for
failure to make a payment of Rent, and (iii) Tenant then has cash on hand,
including cash equivalents and marketable securities, in an amount in excess of
Tenant's net loss, as determined under generally accepted accounting principles,
for the combined two (2) most recent calendar years..

        9.4 The Letter of Credit or Certificate of Deposit shall be reduced to
$501,984 at such time as Tenant achieves, or is merged into or acquired by
another company with, a Standard & Poor's investment-grade rating of BBB or
better; provided, however, that the other company becomes responsible for
Tenant's obligations under this Lease, either by operation of law or an
assumption of this Lease in form and substance reasonably satisfactory to
Landlord; provided further, that Tenant shall replenish the Letter of Credit or
Certificate of Deposit to the amount otherwise required by Sections 9.1 through
9.3 above during any period the Standard & Poor's investment-grade rating of
Tenant or the other company, as the case may be, falls below BBB.

        9.5 Tenant shall be responsible for any expenses in obtaining, replacing
and maintaining the Letter of Credit or Certificate of Deposit. If Landlord
draws upon the Letter of Credit, any cash proceeds not used by Landlord shall be
deposited in an interest-bearing account with a bank reasonably satisfactory to
Tenant. All interest earned on any cash proceeds of the Letter of Credit or any
Certificate of Deposit shall belong to Tenant.

        9.6 The Letter of Credit, and any replacement Letter of Credit, shall be
issued by Bank of America, or another financial institution reasonably
acceptable to Landlord, with an office in Seattle, Washington, authorized to
disburse funds upon a draw request. Should the institution be placed in
conservatorship or receivership by the Federal Deposit Insurance Corporation or
any other state of federal regulatory agency, Tenant shall, within thirty (30)
days after written request by Landlord, provide a replacement Letter of Credit
from a financial institution reasonably acceptable to Landlord, and in the event
Tenant fails to do so, Landlord may draw on the Letter of Credit and use the
proceeds thereof as a security deposit in accordance with the provisions of
Section 9.1.

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<PAGE>   16

        9.7 The Letter of Credit shall provide (i) that the issuer of the Letter
of Credit shall pay to Landlord the amount in default immediately upon
presentation in Seattle, Washington, of a sight draft by Landlord accompanied by
a certified statement signed by an officer of the manager of Landlord (or, if
any successor Landlord is a corporation or a partnership, by any officer of the
corporation or general partner of the partnership, as the case may be) stating
that a default has occurred under the Lease, Landlord has given all required
notices to Tenant in accordance with the Lease, and Tenant has failed to cure
the default within the applicable time period, as a result of which Landlord is
entitled to collect the amount specified in the site draft in order to cure the
default, and (ii) that the issuer shall have no obligation to confirm that a
default has occurred, or the amount which Landlord is entitled to draw, or that
notice of the default has been given to Tenant, or that Tenant has failed to
cure the default.

        9.8 The initial Letter of Credit shall be for a period of not less than
one (1) year, and any replacement Letter of Credit shall be for a period of not
less than one (1) year. The initial Letter of Credit (or any later replacement
Letter of Credit) shall be replaced by Tenant by delivering to Landlord a
replacement Letter of Credit at least thirty (30) days prior to the expiration
of the then current Letter of Credit. If Tenant fails to deliver a replacement
Letter of Credit at least thirty (30) days prior to the expiration of the then
current Letter of Credit, Landlord shall have the right to draw the total amount
of the then current Letter of Credit and hold the proceeds thereof as a security
deposit pursuant to the provisions of Section 9.1. The Letter of Credit shall be
successively renewed or replaced until that date which is thirty (30) days after
the expiration of the initial or any extended term of this Lease.

        9.9 In the event of a partial draw on the Letter of Credit, or the use
of any proceeds of the Certificate of Deposit, Tenant shall immediately
replenish the Letter of Credit or substitute a new Letter of Credit, or
replenish the Certificate of Deposit, to the full amount set forth above.

        9.10 Any Letter of Credit or security interest in a Certificate of
Deposit shall be transferable by Landlord to a successor Landlord or mortgagee
or beneficiary of a deed of trust encumbering the Premises, or, in the case of a
Letter of Credit, a substitute Letter of Credit shall be issued to any such
entity at the request of Landlord; provided, however, that Landlord shall pay
any expenses incurred by Tenant on account of any such transfer or issuance.

        9.11 In the event of bankruptcy or other debtor/creditor proceedings
against Tenant, the proceeds of the Letter of Credit or Certificate of Deposit
shall be deemed to be applied first to the payment of Rent and other charges due
Landlord for all periods prior to the filing of such proceedings.

        9.12 Landlord shall deliver the Letter of Credit or security interest in
the Certificate of Deposit, and any proceeds thereof, to any purchaser of
Landlord's interest in the Premises, and thereupon Landlord shall be discharged
from any further liability with respect thereto, provided that such purchaser
has agreed to assume in writing the obligations of Landlord hereunder. This
provision shall also apply to any subsequent transfers.

                                       13
<PAGE>   17

        9.13 The Letter of Credit or Certificate of Deposit, and any proceeds
thereof, shall be returned to Tenant within thirty (30) days following the
expiration of this Lease, except for amounts which are needed by Landlord to
cure any default by Tenant.

10.     USE.

        10.1 Tenant may use the Premises for any use permitted by (i) the
applicable zoning, (ii) any other applicable laws, regulations, ordinances,
requirements, permits and approvals applicable to the Premises, and (iii) all
covenants, conditions and restrictions recorded against the Project, and shall
not use the Premises, or permit or suffer the Premises to be used for any other
purpose without the prior written consent of Landlord. Landlord represents and
warrants that, as of the date of execution of this Lease, the only covenants,
conditions and restrictions recorded against the Project are those certain
Amended and Restated Declaration of Covenants, Conditions and Restrictions for
Canyon Park Business Center recorded on May 4, 1995 as Document No. 95-05040100
in the files of the County Auditor of Snohomish County, Washington.

        10.2 Tenant shall conduct its business operations and use the Premises
in compliance with all federal, state, and local laws, regulations, ordinances,
requirements, permits and approvals applicable to the Premises. Tenant shall not
use or occupy the Premises in violation of any law or regulation or the
certificate of occupancy issued for the Building, and shall, upon five (5) days'
written notice from Landlord, discontinue any use of the Premises which is
declared by any governmental authority having jurisdiction to be a violation of
law or the certificate of occupancy, subject to Tenant's right to object to or
contest the violation in good faith and with diligence. Subject to Landlord's
warranties in Sections 14.1 and 14.2, Tenant shall comply with any direction of
any governmental authority having jurisdiction which shall, by reason of the
nature of Tenant's specific and unique use or occupancy of the Premises, impose
any duty upon Tenant or Landlord with respect to the Premises or with respect to
the use or occupation thereof which is materially different from those in effect
at the Term Commencement Date, including any duty to make structural or capital
improvements, alterations, repairs and replacements to the Premises; provided,
however, if the costs thereof exceed an amount equal to six (6) monthly
installments of the Basic Annual Rent then payable, Tenant may elect to
terminate the Lease if Landlord, after notice from Tenant, declines to pay such
excess.

        10.3 Tenant shall not do or permit to be done anything which will
invalidate or increase the cost (unless Tenant agrees to pay such increased
cost) of any fire, extended coverage or any other insurance policy covering the
Premises, or which will make such insurance coverage unavailable on commercially
reasonable terms and conditions, and shall comply with all rules, orders,
regulations and requirements of the insurers of the Premises.

        10.4 Subject to the warranty of Landlord in Section 14.3, Tenant shall
comply with the Americans with Disabilities Act of 1990 ("ADA"), and the
regulations promulgated thereunder, as amended from time to time. All
responsibility for compliance with the ADA relating to the Premises and the
activities conducted by Tenant within the Premises shall be exclusively that of
Tenant and not of Landlord, including any duty to make structural or capital
improvements, alterations, repairs and replacements to the Premises. Any
alterations to the Premises made by

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<PAGE>   18

Tenant for the purpose of complying with the ADA or which otherwise require
compliance with the ADA shall be done in accordance with Article 17; provided,
that Landlord's consent to such alterations shall not constitute either
Landlord's assumption, in whole or in part, of Tenant's responsibility for
compliance with the ADA, or representation or confirmation by Landlord that such
alterations comply with the provisions of the ADA. However, nothing in this
Lease shall be construed to require Tenant to make structural or capital
improvements, alterations, repairs or replacements to comply with ADA unless and
until required to do so by order of any government entity or court of law
exercising proper jurisdiction with regard thereto, subject to any right to
appeal or otherwise contest any such order. Furthermore, Landlord shall be
responsible for compliance with ADA to the extent of a violation of Landlord's
warranty in Section 14.3.

        10.5 Tenant may install signage on and about the Premises to the extent
permitted by, and in conformity with, the applicable provisions of any
governmental law, ordinance or regulation, and to the extent reasonably approved
by Landlord. Tenant acknowledges that it understands that other tenants will
occupy space in the Project, and that the maximum allowable signage is to be
shared among all of the tenants on a fair and reasonable basis. Tenant further
acknowledges it is familiar with the restrictions of any governmental law,
ordinance or regulation governing signage, and is not relying on any
representations or warranty of Landlord regarding the number, size or location
of any signage. The expense of design, permits, purchase and installation of any
signs shall be the responsibility of Tenant and the cost thereof shall be borne
by Tenant, and shall not be paid from the Tenant Improvement Allowance. At the
termination of the Lease, all signs shall be the property of Tenant and may be
removed from the Premises by Tenant, subject to the provisions of Article 36.
Any relocation of Tenant's signage required by Landlord's division of the
Project into more than one lot shall be with the consent of Tenant and at
Landlord's expense.

        10.6 No equipment shall be placed at a location within the Premises
other than a location designed to carry the load of the equipment. Equipment
weighing in excess of floor loading capacity shall not be placed in the
Building. Landlord represents to Tenant that the load capacity of the first
floor is approximately 250 lbs/square foot, and the load capacity of the new
mezzanine will be no less than 125 lbs/square foot.

        10.7 Tenant shall not use or allow the Premises to be used for any
unlawful purpose, nor shall Tenant cause, maintain or permit any nuisance or
waste in, on, or about the Premises.

11.     BROKERS.

        11.1 Landlord and Tenant represent and warrant one to the other that
there have been no dealings with any real estate broker or agent in connection
with the negotiation of this Lease other than Alexander Commercial Real Estate,
Inc., which represented Landlord, and Trammell Crow Company, which represented
Tenant. The commissions of both brokers shall be paid by Landlord. Landlord and
Tenant shall each indemnify, defend, protect, and hold harmless the other from
any claim of any other broker as a result of any act or agreement of the
indemnitor.

                                       15
<PAGE>   19

        11.2 Tenant represents and warrants that no broker or agent has made any
representation or warranty relied upon by Tenant in Tenant's decision to enter
into this Lease other than as contained in this Lease.

12.     HOLDING OVER.

        12.1 If, with Landlord's consent, Tenant holds possession of all or any
part of the Premises after the expiration or earlier termination of this Lease,
Tenant shall become a tenant from month to month upon the date of such
expiration or earlier termination, and in such case Tenant shall continue to pay
in accordance with Article 5 the Basic Annual Rent as adjusted from the Term
Commencement Date in accordance with Article 6, together with Operating Expenses
in accordance with Article 7 and other Additional Rent as may be payable by
Tenant, and such month-to-month tenancy shall be subject to every other term,
covenant and condition contained herein.

        12.2 If Tenant remains in possession of all or any portion of the
Premises after the expiration or earlier termination of the term hereof without
the express written consent of Landlord, Tenant shall become a tenant at
sufferance upon the terms of this Lease except that each monthly installment of
Basic Annual Rent shall be equal to one hundred twenty five percent (125%) of
each monthly installment of Basic Annual Rent that was payable during the last
twelve (12) months of the Lease term.

        12.3 Acceptance by Landlord of Rent after such expiration or earlier
termination shall not result in a renewal or reinstatement of this Lease.

        12.4 The foregoing provisions of this Article 12 are in addition to and
do not affect Landlord's right to re-entry or any other rights of Landlord under
Article 24 or elsewhere in this Lease or as otherwise provided by law.

13.     TAXES ON TENANT'S PROPERTY.

        13.1 Tenant shall pay not less than ten (10) days before delinquency
taxes levied against any personal property or trade fixtures placed by Tenant in
or about the Premises. Tenant shall not be responsible for taxes levied against
any personal property or trade fixtures of other tenants.

        13.2 If any such taxes on Tenant's personal property or trade fixtures
are levied against Landlord or Landlord's property or, if the assessed valuation
of the Project is increased by the inclusion therein of a value attributable to
Tenant's personal property or trade fixtures, and if Landlord after written
notice to Tenant pays the taxes based upon such increase in the assessed value,
then Tenant shall upon demand repay to Landlord the taxes so levied against
Landlord.

        13.3 If any improvements in or alterations to the Premises, whether
owned by Landlord or Tenant and whether or not affixed to the real property so
as to become a part thereof, are assessed for real property tax purposes at a
valuation higher than the valuation at which improvements in other spaces in the
Project are assessed, then the real property taxes and

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<PAGE>   20

assessments levied against Landlord or the Project by reason of such excess
assessed valuation shall be deemed to be taxes levied against personal property
to Tenant and shall be governed by the provisions of Section 13.2 above. Any
such excess assessed valuation due to improvements in or alterations to space in
the Project leased by other tenants of Landlord shall not be included in the
Operating Expenses defined in Section 7, but shall be treated, as to such other
tenants, as provided in this Section 13.3, and shall be allocated to such other
tenants. If the records of the County assessor are available and sufficiently
detailed to serve as a basis for determining whether said Tenant improvements or
alterations are assessed at a higher valuation than improvements in other spaces
in the Project, such records shall be binding on both Landlord and Tenant.

        13.4 To the extent Tenant fails to make any payment required by this
Article 13 and Landlord does so on Tenant's behalf, Tenant shall reimburse
Landlord for the cost thereof pursuant to the provisions of Sections 7.1 and
24.3.

14.     CONDITION OF PREMISES.

        14.1 Tenant acknowledges that neither Landlord nor any agent of Landlord
has made any representation or warranty, express or implied, with respect to the
condition of the Premises, or to the Project, except as set forth herein, or
with respect to their suitability for the conduct of Tenant's business.

        14.2 Landlord warrants to Tenant that the Project (other than the Tenant
Improvements, which are the responsibility of Tenant), will be built in a good
and workmanlike manner and in substantial compliance with the project plans and
all applicable building code requirements, laws, rules, orders, ordinances,
directions, regulations, permits, approvals, and requirements of all
governmental agencies, offices, departments, bureaus and boards having
jurisdiction, and with the rules, orders, directions, regulations, and
requirements of any applicable fire rating bureau, and will be free of patent
and latent defects in design, materials and construction. Landlord shall, at
Landlord's expense, promptly correct all such defects upon receiving written
notice thereof from Tenant.

        14.3 Landlord warrants to Tenant that the Project (other than the Tenant
Improvements, which are the responsibility of Tenant) will be in compliance with
ADA, and the regulations promulgated thereunder, at such time as the Site
Improvements and Building Shell are completed.

15.     COMMON AREAS AND PARKING FACILITIES.

        15.1 Tenant shall have the nonexclusive right, in common with others, to
use the Common Areas, subject to the rules and regulations adopted by Landlord
and attached hereto as Exhibit "E" together with such other reasonable and
nondiscriminatory rules and regulations as are hereafter promulgated by Landlord
(the "Rules and Regulations").

        15.2 Tenant shall not place any equipment, storage containers or any
other property on the surface parking area or otherwise outside of the Premises
without the consent of Landlord.

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<PAGE>   21

In the event Tenant elects to locate Hazardous Material storage facilities,
water systems, mechanical equipment, emergency generators, or other Tenant
Improvements in the parking area, the space used for such facilities shall be
part of the portion of the parking area that Tenant would otherwise use for
parking pursuant to Section 15.3.

        15.3 As an appurtenance to the Premises, Tenant, and its employees and
invitees, shall be entitled to use, without additional charge, at least 91
parking spaces in the parking area (computed at 2.4 spaces per 1,000 square feet
of Rentable Area). All parking areas serving the Project shall be used in common
with other tenants of the Project; provided, however, twenty (20) spaces
immediately in front of the Premises (and not in front of another tenant's
premises), at locations mutually acceptable to both Landlord and Tenant, shall
be appropriately identified by Landlord at Landlord's expense as reserved for
Tenant's use by words painted on the asphalt surface of each such space;
provided further, Landlord reserves the right to similarly identify other
parking spaces as reserved for other tenants of the Project. Landlord shall not
be responsible for policing the use of the reserved spaces.

16.     UTILITIES AND SERVICES.

        16.1 Tenant shall pay for all water, gas, electricity, telephone, cable
television, and other utilities which may be furnished to the Premises during
the term of this Lease, together with any taxes thereon. If any such utility is
not separately metered to Tenant, Tenant shall pay a reasonable proportion to be
determined by Landlord of all charges jointly metered with tenants of other
premises and shall be paid together with Operating Expenses. Utilities and
services provided to the Premises which are separately metered shall be paid by
Tenant directly to the supplier of such utility or service, and Tenant shall pay
for such utilities and services prior to delinquency during the term of this
Lease.

        16.2 Landlord shall not be liable for, nor shall any eviction of Tenant
result from, any failure of any such utility or service, and in the event of
such failure Tenant shall not be entitled to any abatement or reduction of Rent,
nor be relieved from the operation of any covenant or agreement of this Lease,
and Tenant waives any right to terminate this Lease on account thereof. However,
notwithstanding the foregoing, (i) in the event any such failure is due to
Landlord's negligence or willful misconduct and persists for more than five (5)
days, Tenant shall be entitled to rent abatement to the extent such failure
materially interferes with Tenant's ability to conduct business from the
Premises, and (ii) in the event any such failure persists for more than six (6)
months, Tenant at its election may terminate this Lease.

        16.3 Tenant shall provide and pay for janitors, maintenance personnel,
and other persons who perform duties connected with the operation and
maintenance of the interior of the Premises.

        16.4 Landlord represents that Tenant shall be allocated for its use its
Pro Rata Share of 4,000 amps of electricity which will be provided to the
Building (the power itself payable as an Operating Expense). Facilities
necessary for any additional power requirements of Tenant shall be at Tenant's
expense.

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<PAGE>   22

17.     ALTERATIONS.

        17.1 Tenant shall make no alterations, additions or improvements
(hereinafter in this section, "improvements") in or to the Premises, except for
non-structural improvements costing less than $50,000 in any one instance nor in
the aggregate in any 12-month period, without Landlord's prior written consent,
which shall not be unreasonably withheld or delayed. Tenant shall deliver to
Landlord final plans and specifications and working drawings for the
improvements to Landlord, and Landlord shall have ten (10) days thereafter to
grant or withhold its consent. If Landlord does not notify Tenant of its
decision within the ten (10) days, Landlord shall be deemed to have given its
approval. As used herein, "improvement" shall not include, and Tenant shall not
need to obtain Landlord's consent for, interior decorations, cabling, wiring and
installation of furniture, fixtures and equipment.

        17.2 If a permit is required to construct the improvements, Tenant shall
deliver a completed, signed-off inspection card to Landlord within ten (10) days
of completion of the improvements, and shall promptly thereafter obtain and
record a notice of completion and deliver a copy thereof to Landlord.

        17.3 The improvements shall be constructed only by licensed contractors.
All contractors, except those constructing non-structural improvements costing
less than $50,000 as set forth in Section 17.1, shall be approved by Landlord,
which approval shall not be unreasonably withheld or delayed. Any such
contractor must have in force a general liability insurance policy of not less
than $2,000,000, which policy of insurance shall name Landlord as an additional
insured. Tenant shall provide Landlord with a copy of the contract with the
contractor and a certificate of insurance showing that the contractor has the
insurance required by this Section 17.3 prior to the commencement of
construction.

        17.4 Tenant agrees that any work by Tenant shall be accomplished in such
a manner as to permit any fire sprinkler system and fire water supply lines to
remain fully operable at all times except when minimally necessary for building
reconfiguration work.

        17.5 Tenant covenants and agrees that all work done by Tenant shall be
performed in good and workmanlike manner and in full compliance with all laws,
rules, orders, ordinances, directions, regulations, permits, approvals, and
requirements of all governmental agencies, offices, departments, bureaus and
boards having jurisdiction, and in full compliance with the rules, orders,
directions, regulations, and requirements of any applicable fire rating bureau.
Tenant shall provide Landlord with "as-built" plans showing any change in the
Premises within thirty (30) days after completion.

        17.6 Before commencing any work (other than interior non-structural
alterations, additions or improvements), Tenant shall give Landlord at least
five (5) days' prior written notice of the proposed commencement of such work.

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<PAGE>   23

18.     REPAIRS AND MAINTENANCE.

        18.1 Landlord shall repair and maintain the structural and exterior
portions and Common Areas of the Building and Project, including foundations,
exterior walls, load bearing walls, windows, plate glass, roofing, and roofing
covering materials, and plumbing, fire sprinkler system, heating, ventilating,
air conditioning, elevator, telecommunications and electrical systems installed
or furnished by Landlord (and not part of the Tenant Improvements), subject to
reimbursement by Tenant as its Pro Rata Share of Operating Expenses to the
extent provided by Section 7. However, if such maintenance or repairs are
required because of any act, neglect, fault of or omissions of any duty by
Tenant, its agents, servants, employees, contractors or invitees, Tenant shall
pay to Landlord upon demand the costs of the entirety of such maintenance and
repairs attributable to such act, neglect, fault or omission, subject to credit
for any insurance proceeds recovered on account thereof..

        18.2 Except as otherwise set forth in Section 18.1, Tenant shall,
throughout the term of this Lease, at Tenant's sole cost and expense, keep the
Premises and every part thereof in the same condition and repair as delivered to
Tenant, including plumbing, fire sprinkler, heating, ventilating, air
conditioning, elevator, and electrical systems installed as part of the Tenant
Improvements. Tenant shall upon the expiration or earlier termination of the
term hereof surrender the Premises to Landlord in the same condition as when
received (together with the Tenant Improvements and any subsequent improvements
made by Tenant), ordinary wear and tear and damage from causes beyond the
reasonable control of Tenant excepted. Except as set forth in Section 18.1,
Landlord shall have no obligation to alter, remodel, improve, repair, decorate
or paint the Premises or any part thereof.

        18.3 There shall be no abatement of Rent and no liability of Landlord by
reason of any injury to or interference with Tenant's business arising from the
making of any repairs, alterations or improvements in or to any portion of the
Premises, Building or Project, or in or to improvements, fixtures, equipment and
personal property therein, unless due to the negligence or willful misconduct of
Landlord, in which case Rent shall abate if Tenant is unable to use the Premises
for more than five (5) days. If repairs or replacements become necessary which
by the terms of this Lease are the responsibility of Tenant and Tenant fails to
make the repairs or replacements within a reasonable time after notice from
Landlord, Landlord may do so pursuant to the provisions of Section 24.3.

19.     LIENS.

        19.1 Tenant shall keep the Premises, the Building and the property upon
which the Building is situated free from any liens arising out of work
performed, materials furnished or obligations incurred by Tenant. Tenant further
covenants and agrees that any mechanic's lien filed against the Premises for
work claimed to have been done for, or materials claimed to have been furnished
to, Tenant, will be discharged by Tenant, by bond or otherwise, within thirty
(30) days after Tenant receives notice of the filing thereof (or within ten (10)
days after the filing thereof if requested by Landlord as necessary to
facilitate a pending sale or refinancing), at the cost and expense of Tenant.

                                       20
<PAGE>   24

        19.2 Should Tenant fail to discharge any lien of the nature described in
Section 19.1, Landlord may at Landlord's election pay such claim or post a bond
or otherwise provide security to eliminate the lien as a claim against title and
the cost thereof shall be immediately due from Tenant as Additional Rent.

        19.3 In the event Tenant shall lease or finance the acquisition of
office equipment, furnishings, or other personal property utilized by Tenant in
the operation of Tenant's business, Tenant warrants that any Uniform Commercial
Code financing statement executed by Tenant will upon its face or by exhibit
thereto indicate that such financing statement is applicable only to personal
property of Tenant specifically described in the financing statement, and that
such property is subject to the provisions of Section 30 regarding the removal
of property on the expiration or earlier termination of this Lease. In no event
shall the address of the Building be furnished on the financing statement
without qualifying language as to applicability of the lien only to personal
property of Tenant described in the financing statement. Should any holder of a
security agreement executed by Tenant record or place of record a financing
statement which appears to constitute a lien against any interest of Landlord,
Tenant shall within ten (10) days after the filing of such financing statement
cause (i) copies of the security agreement or other documents to which the
financing statement pertains to be furnished to Landlord to facilitate
Landlord's being in a position to show such lien is not applicable to any
interest of Landlord, and (ii) the holder of the security interest to amend
documents of record so as to clarify that such lien is not applicable to any
interest of Landlord in the Premises.

20.     INDEMNIFICATION AND EXCULPATION.

        20.1 Except to the extent of the responsibility of Landlord pursuant to
Section 20.2 hereof, Tenant agrees to indemnify Landlord, and its partners and
affiliates, and their respective shareholders, directors, officers, agents,
contractors and employees (collectively, "Landlord's Agents"), against, and to
protect, defend, and save them harmless from, all demands, claims, causes of
action, liabilities, losses and judgments, and all reasonable expenses incurred
in investigating or resisting the same (including reasonable attorneys' fees),
for death of or injury to person or damage to property arising out of (i) any
occurrence in, upon or about the Premises during the term of this Lease, (ii)
Tenant's use, occupancy, repairs, maintenance, and improvements of the Premises
and all improvements, fixtures, equipment and personal property thereon, and
(iii) any act or omission of Tenant, its shareholders, directors, officers,
agents, employees, servants, contractors, invitees and subtenants, except to the
extent caused by the negligence or willful misconduct of Landlord or Landlord's
Agents. Tenant's obligation under this Section 20.1 shall survive the expiration
or earlier termination of the term of this Lease.

        20.2 Landlord agrees to indemnify Tenant and Tenant's shareholders,
directors, officers, agents, and employees (collectively "Tenant's Agents")
against and save them harmless from all demands, claims, causes of action,
liabilities, losses and judgments, and all reasonable expenses incurred in
investigating or resisting the same (including reasonable attorneys' fees), for
death of, or injury to, any person or damage to property arising from or out of
any occurrence in, upon, or about the Premises during the term of this Lease if
caused by the act or omission of Landlord or Landlord's Agents, except to the
extent caused by the negligence or willful

                                       21
<PAGE>   25

misconduct of Tenant or Tenant's Agents. Landlord's obligations under this
Section 20.2 shall survive the expiration or earlier termination of the term of
this Lease.

        20.3 Notwithstanding any provision of Sections 20.1 and 20.2 to the
contrary, Landlord shall not be liable to Tenant and Tenant assumes all risk of
damage to any fixtures, goods, inventory, merchandise, equipment, records,
research, experiments, animals and other living organisms, computer hardware and
software, leasehold improvements, and other personal property of any nature
whatsoever, and Landlord shall not be liable for injury to Tenant's business or
any loss of income therefrom relative to such damage, unless caused by
Landlord's or Landlord's Agents' willful misconduct or gross negligence.

        20.4 The indemnity obligations of both Landlord and Tenant under this
Section 20 shall be satisfied to the extent of proceeds of applicable insurance
maintained by the indemnifying party to the extent thereof, and thereafter to
proceeds of any applicable insurance maintained by the other party; Landlord and
Tenant shall be required to satisfy any such obligation only to the extent it is
not satisfied by proceeds of applicable insurance as set forth above.

        20.5 Security devices and services, if any, while intended to deter
crime, may not in given instances prevent theft or other criminal acts, and it
is agreed that Landlord shall not be liable for injuries or losses caused by
criminal acts of third parties and the risk that any security device or service
may malfunction or otherwise be circumvented by a criminal is assumed by Tenant.
Tenant shall at Tenant's cost obtain insurance coverages to the extent Tenant
desires protection against such criminal acts.

        20.6 Landlord shall not be liable for any damages arising from any act
or neglect of any other tenant in the Building or Project.

21.     INSURANCE - WAIVER OF SUBROGATION.

        21.1 Commencing prior to Tenant's first entry onto the Premises for
purposes of installing any improvements, fixtures or personal property, but no
later than the Term Commencement Date, and continuing at all times during the
term of this Lease, Tenant shall maintain, at Tenant's expense, commercial
general liability insurance, on an occurrence basis, insuring Tenant and
Tenant's agents, employees and independent contractors against all bodily
injury, property damage, personal injury and other covered loss arising out of
the use, occupancy, improvement and maintenance of the Premises and the business
operated by Tenant, or any other occupant, on the Premises. Such insurance shall
have a minimum combined single limit of liability per occurrence of not less
than $1,000,000.00 and a general aggregate limit of $2,000,000.00. Such
insurance shall: (i) name Landlord, and Landlord's lenders if required by such
lenders, and any management company retained to manage the Premises if requested
by Landlord, as additional insureds; (ii) include a broad form contractual
liability endorsement insuring Tenant's indemnity obligations under Section 20.1
if and to the extent available; (iii) include a products liability coverage
endorsement (with limits of $2,000,000.00 on a "claims made" basis), a boiler
and machinery liability endorsement, and a products completed operations
coverage endorsement; (iv) provide that it is primary coverage and
noncontributing with any

                                       22
<PAGE>   26

insurance maintained by Landlord or Landlord's lenders, which shall be excess
insurance with respect only to losses arising out of Tenant's negligence; and
(v) provide for severability of interests or include a cross-liability
endorsement, such that an act or omission of an insured shall not reduce or
avoid coverage of other insureds.

        21.2 At all times during the term of this Lease, Landlord shall
maintain, subject to reimbursement by Tenant as an Operating Expense under
Section 7.1(b), "all risk" insurance, including, but not limited to, coverage
against loss or damage by fire, vandalism, and malicious mischief covering the
Project (exclusive of excavations, foundations and footings), the Tenant
Improvements, and all other improvements and fixtures that may be constructed or
installed on the Premises, in an amount equal to one hundred percent (100%) of
the full replacement value thereof, and including rental interruption insurance
for a period of not less than nine (9) months. If any boilers or other pressure
vessels or systems are installed on the Premises, Landlord shall maintain,
subject to reimbursement by Tenant as an Operating Expense under Section 7.1(b),
boiler and machinery insurance in an amount equal to one hundred percent (100%)
of the full replacement value thereof. At all times during the course of any
major demolition or construction permitted hereunder, or any restoration
pursuant to Articles 22 or 23, Tenant shall maintain, at Tenant's expense, "all
risk" builder's risk insurance, including, but not limited to, coverage against
loss or damage by fire, vandalism and malicious mischief, covering improvements
in place and all material and equipment at the job site furnished under
contract, in an amount equal to one hundred percent (100%) of the full
replacement value thereof. Landlord shall maintain, subject to reimbursement by
Tenant as an Operating Expense under Section 7.1(b), earthquake insurance, in
such amounts, subject to such deductibles, and for such premiums as are
commercially reasonable, but only if such insurance is (i) required by
Landlord's permanent mortgage lender, and (ii) prevalent or becoming prevalent
for similar projects in the same general area as the Premises. The insurance
described in this Section 21.2 shall: (i) insure Landlord, and Landlord's
lenders if required by such lenders, as their interests may appear; (ii) contain
a Lender's Loss Payable Form (Form 438 BFU or equivalent) in favor of Landlord's
lenders and name Landlord, or Landlord's lender if required by such lender, as
the loss payee; (iii) provide for severability of interests or include a
cross-liability endorsement, such that an act or omission of an insured shall
not reduce or avoid coverage of other insureds; (iv) include an agreed amount
endorsement and an inflation endorsement; and (v) provide that it is primary
coverage and noncontributing with any insurance maintained by Landlord or
Landlord's lenders, which shall be excess insurance. The full replacement value
of the Project, the Tenant Improvements and other improvements and fixtures
insured thereunder shall, for the purpose of establishing insurance limits and
premiums only, be determined by the company issuing the insurance policy and
shall be redetermined by said company within six (6) months after completion of
any material alterations or improvements to the Premises and otherwise at
intervals of not more than three (3) years. Landlord shall promptly increase the
amount of the insurance carried pursuant to this Section 21.2 to the amount so
redetermined. The proceeds of the insurance described in this Section shall be
used for the repair, replacement and restoration of the Premises and the Tenant
Improvements and other improvements and fixtures insured thereunder, as further
provided in Article 22; provided, however, if this Lease is terminated after
damage or destruction, the insurance policy or policies, all rights thereunder
and all insurance proceeds shall be assigned to Landlord.

                                       23
<PAGE>   27

        21.3 At all times during the term of this Lease, Tenant shall maintain,
at Tenant's expense, business interruption insurance in order to insure that the
Basic Annual Rent and Operating Expenses provided for hereunder will be paid for
a period of up to one (1) year after any casualty insured against by all risk
policy of insurance described in Section 21.2 above or any restriction of access
to the Premises as a result of such casualty.

        21.4 At all times during the term of this Lease, Tenant shall maintain,
at Tenant's expense, "all risk" insurance against all other personal property,
including trade fixtures, equipment and merchandise, of Tenant or any subtenant
of Tenant that may be occupying the Premises, or any portion thereof, from time
to time, in an amount equal to the full replacement value thereof.

        21.5 At all times during the term of this Lease, Tenant shall maintain
workers' compensation insurance in accordance with state law, and employers'
liability insurance with limits typical for companies similar to Tenant.

        21.6 All of the policies of insurance referred to in this Article 21
shall be written by companies authorized to do business in Washington and rated
A+VII or better in Best's Insurance Guide. Each insurer referred to in this
Article 21 shall agree, by endorsement on the applicable policy or by
independent instrument furnished to Landlord, that it will give Landlord, and
Landlord's lenders if required by such lenders, at least ten (10) days' prior
written notice before the applicable policy shall be canceled for nonpayment of
premium, and thirty (30) days' prior written notice before the applicable policy
shall be canceled or altered in coverage, scope, amount or other material term
for any other reason (although any failure of an insurer to give notice as
provided herein shall not be a breach of this Lease by Tenant). No policy shall
provide for a deductible amount in excess of $100,000, unless approved in
advance in writing by Landlord, which approval shall not be unreasonably
withheld. Tenant shall deliver to Landlord, and to Landlord's lenders if
required by such lenders, copies of the insurance policies required to be
carried by Tenant, certified by the insurer, or certificates evidencing such
insurance policies, issued by the insurer, together with evidence of payment of
the required premiums, prior to the required date for commencement of such
coverage. At least thirty (30) days prior to expiration of any such policy,
Tenant shall deliver to Landlord, and Landlord's lenders if required by such
lenders, a certificate evidencing renewal, or a certified copy of a new policy
or certificate evidencing the same, together with evidence of payment of the
required premiums. If Tenant fails to provide to Landlord any such policy or
certificate by the required date for commencement of coverage, or within fifteen
(15) days prior to expiration of any policy, or to pay the premiums therefor
when required, Landlord shall have the right, but not the obligation, to procure
said insurance and pay the premiums therefor. Any premiums so paid by Landlord
shall be repaid by Tenant to Landlord with the next due installment of rent, and
failure to repay the same shall have the same consequences as failure to pay any
installment of Rent.

        21.7 Landlord may provide the property insurance required under this
Article 21 pursuant to a so-called blanket policy or policies of property
insurance maintained by Landlord.

        21.8 Landlord and Tenant each hereby waives any and all rights of
recovery against the other or against the officers, directors, partners,
employees, agents, and representatives of the

                                       24
<PAGE>   28

other, on account of loss or damage to such waiving party's property or the
property of others under its control, to the extent that such loss or damage is
caused by or results from risks insured against under any insurance policy which
insures such waiving party's property at the time of such loss or damage. Prior
to obtaining policies of insurance required or permitted under this Lease,
Landlord and Tenant shall give notice to the insurers that the foregoing mutual
waiver is contained in this Lease, and each party shall cause such insurer to
approve such waiver in writing and to cause each insurance policy obtained by it
to provide that the insurer waives all right of recovery by way of subrogation
against the other party. If the release of either Landlord or Tenant, as set
forth in the first sentence of this Section 21.8, shall contravene any law with
respect to exculpatory agreements, the liability of the party in question shall
be deemed not released but shall be secondary to the other's insurer.

22.     DAMAGE OR DESTRUCTION.

        22.1 In the event of damage to or destruction of all or any portion of
the Premises or the improvements and fixtures thereon (collectively,
"improvements") arising from a risk covered by the insurance described in
Section 21.2, Landlord shall within a reasonable time commence and proceed
diligently to repair, reconstruct and restore (collectively, "restore") the Site
Improvements and Building Shell to substantially the same condition as they were
in immediately prior to the casualty, and Tenant shall within a reasonable time
commence and proceed diligently to restore the Tenant Improvements to
substantially the same condition as they were in immediately prior to the
casualty, whether or not the insurance proceeds are sufficient to cover the
actual cost of restoration. Landlord shall be responsible for all insurance
deductibles attributable to the Site Improvements and Building Shell, and for
all costs of restoration of the Site Improvements and Building Shell in excess
of insurance proceeds for the Site Improvements and Building Shell. Tenant shall
be responsible for all insurance deductibles attributable to the Tenant
Improvements, and for all costs of restoration in excess of insurance proceeds
for the Tenant Improvements, as an Operating Expense under Section 7.1(b).
Except as expressly set forth below, this Lease shall continue in full force and
effect, notwithstanding such damage or destruction.

        22.2 In the event of any damage to or destruction of all or any portion
of the improvements arising from a risk which is not covered by the insurance
described in Section 21.2, Landlord shall within a reasonable time, at its
expense, commence and proceed diligently to restore the Site Improvements and
Building Shell to substantially the same condition as they were in immediately
prior to the casualty, and Tenant shall within a reasonable time, at its
expense, commence and proceed diligently to restore the Tenant Improvements to
substantially the same condition as they were in immediately prior to the
casualty. This Lease shall continue in full force and effect notwithstanding
such damage or destruction; provided, however, that if the damage or destruction
(i) occurs during the last two years of the term and the expense of restoration
to either Landlord or Tenant exceeds $200,000, or (ii) occurs at any other time
and the expense of restoration to either Landlord or Tenant exceeds $500,000,
the party responsible for the cost may at its election terminate the Lease
unless the other party elects to pay the full cost of restoration.

                                       25
<PAGE>   29

        22.3 In satisfying its obligations under this Article 22, neither party
shall be required to fulfill its restoration responsibilities with improvements
identical to those which were damaged or destroyed; rather, with the consent of
the other party, which consent will not be unreasonably withheld, the restoring
party may restore the damage or destruction with improvements reasonably
equivalent or of reasonably equivalent value to those damaged or destroyed.

        22.4 In the event of damage, destruction and/or restoration as herein
provided, there shall be no abatement of Rent (except that Tenant shall be
credited with any proceeds of rental interruption insurance carried by Landlord
pursuant to Section 21.2), and Tenant shall not be entitled to any compensation
or damages occasioned by any such damage, destruction or restoration.
Notwithstanding the foregoing, in the event restoration of the Site Improvements
and Building Shell cannot reasonably be completed within nine (9) months
following the damage or destruction, Landlord will give notice thereof to Tenant
within sixty (60) days following such damage or destruction, and Tenant at its
election may by written notice to Landlord terminate this Lease effective nine
(9) months following such damage or destruction. In the event of such
termination, Tenant shall have no responsibility for contributing to the expense
of restoration.

        22.5 Notwithstanding anything to the contrary contained in this Article,
should a party be delayed or prevented from completing the restoration of the
improvements after the occurrence of such damage or destruction by reason of
acts of God, war, government restrictions, inability to procure the necessary
labor or materials, strikes, or other causes beyond the control of such party
(but excluding economic conditions or financial inability to perform), the time
for such party to commence or complete restoration shall be extended for the
time reasonably required as a result of such event.

        22.6 If an insured casualty occurs, Landlord shall make the loss
adjustment with the insurance company, which adjustment shall be subject to the
approval of Tenant, which approval shall not be unreasonably withheld, and the
proceeds shall be paid to a fund control escrow established by Landlord and
Tenant for the purpose of paying for the restoration required by this Article
22.

        22.7 Tenant waives the provisions of any statute now existing or
hereafter adopted governing destruction of the Premises, so that the parties
rights and obligations in the event of damage or destruction shall be governed
by the provisions of this Lease.

23.     EMINENT DOMAIN.

        23.1 In the event the whole of the Premises shall be taken for any
public or quasi-public purpose by any lawful power or authority by exercise of
the right of appropriation, condemnation or eminent domain, or sold to prevent
such taking, Tenant or Landlord may terminate this Lease effective as of the
date possession is required to be surrendered to said authority.

        23.2 In the event of a partial taking of the Premises for any public or
quasi-public purpose by any lawful power or authority by exercise of right of
appropriation, condemnation, or eminent domain, or sold to prevent such taking,
then Landlord may elect to terminate this Lease

                                       26
<PAGE>   30

if such taking is of a material nature such as to make it uneconomical to
continue use of the unappropriated portions for the purposes for which they were
intended, and Tenant may elect to terminate this Lease if such taking is of
material detriment to, and substantially interferes with, Tenant's use and
occupancy of the Premises. In no event shall this Lease be terminated when such
a partial taking does not have a material adverse effect upon Landlord or Tenant
or both. Termination by either party pursuant to this Section shall be effective
as of the date possession is required to be surrendered to said authority.

        23.3 If upon any taking of the nature described in this Article 23 this
Lease continues in effect, then Landlord shall promptly proceed to restore the
remaining portion of the Premises, and all improvements and fixtures located
thereon, to substantially their same condition prior to such partial taking;
provided, however, Landlord's obligation hereunder shall be limited to the
amount of the condemnation proceeds. Basic Annual Rent shall be abated
proportionately on the basis of the rental value of the Premises, including
improvements and fixtures, as restored after such taking compared to the rental
value of the Premises prior to such taking. No award for any partial or entire
taking shall be apportioned; provided, however, that nothing contained herein
shall be deemed to give Landlord any interest in or to require Tenant to assign
to Landlord any award made to Tenant for (i) the taking of personal property and
fixtures belonging to Tenant, (ii) interruption of or damage to Tenant's
business, (iii) Tenant's unamortized costs of leasehold improvements (other than
Tenant Improvements paid for by Landlord), and (iv) Tenant's moving expenses.

24.     DEFAULTS AND REMEDIES.

        24.1 Late payment by Tenant to Landlord of Rent and other sums due will
cause Landlord to incur costs not contemplated by this Lease, the exact amount
of which will be extremely difficult and impracticable to ascertain. Such costs
include, but are not limited to, processing and accounting charges and late
charges which may be imposed on Landlord by the terms of any mortgage or trust
deed covering the Premises. Therefore, if any installment of Rent due from
Tenant is not received by Landlord within ten (10) days after written notice by
Landlord to Tenant that the payment is past due, Tenant shall pay to Landlord an
additional sum of five percent (5%) of the overdue rent as a late charge. The
parties agree that this late charge represents a fair and reasonable estimate of
the costs that Landlord will incur by reason of late payment by Tenant. In
addition to the late charge, Rent not paid within thirty (30) days of the date
such payment is due shall bear interest from thirty (30) days after the date due
until paid at the lesser of (i) ten percent (10%) per annum or (ii) the maximum
rate permitted by law.

        24.2 No payment by Tenant or receipt by Landlord of a lesser amount than
the rent payment herein stipulated shall be deemed to be other than on account
of the rent, nor shall any endorsement or statement on any check or any letter
accompanying any check or payment as rent be deemed an accord and satisfaction,
and Landlord may accept such check or payment without prejudice to Landlord's
right to recover the balance of such rent or pursue any other remedy provided.
If at any time a dispute shall arise as to any amount or sum of money to be paid
by Tenant to Landlord, Tenant shall have the right to make payment "under
protest" and such payment shall not be regarded as a voluntary payment, and
there shall survive the right on the part of Tenant to institute suit for
recovery of the payment paid under protest.

                                       27
<PAGE>   31

        24.3 If Tenant fails to pay any sum of money (other than Basic Annual
Rent) required to be paid by it hereunder, or shall fail to perform any other
act on its part to be performed hereunder, Landlord may, without waiving or
releasing Tenant from any obligations of Tenant, but shall not be obligated to,
make such payment or perform such act; provided, that such failure by Tenant
continued for ten (10) days after written notice from Landlord demanding
performance by Tenant was delivered to Tenant, or that such failure by Tenant
unreasonably and materially interfered with the use or efficient operation of
the Premises, or resulted or could have resulted in a material violation of law
or the cancellation of an insurance policy maintained by Landlord. All sums so
paid or incurred by Landlord, together with interest thereon, from the date such
sums were paid or incurred, at the annual rate equal to ten percent (10%) per
annum or highest rate permitted by law, whichever is less, shall be payable to
Landlord on demand as Additional Rent.

        24.4 The occurrence of any one or more of the following events shall
constitute a default hereunder by Tenant:

               (a) The failure by Tenant to make any payment of Rent, as and
when due, where such failure shall continue for a period of ten (10) days after
written notice thereof from Landlord to Tenant. Such notice shall be in lieu of,
and not in addition to, any notice required under Washington law;

               (b) The failure by Tenant to observe or perform any obligation
other than described in Section 24.4(a) to be performed by Tenant, where such
failure shall continue for a period of thirty (30) days after written notice
thereof from Landlord to Tenant; provided, however, that if the nature of
Tenant's default is such that more than thirty (30) days are reasonably required
to cure the default, then Tenant shall not be deemed to be in default if Tenant
shall commence such cure within said thirty (30) day period and thereafter
diligently prosecute the same to completion. Such notice shall be in lieu of,
and not in addition to, any notice required under state law;

               (c) Tenant makes an assignment for the benefit of creditors;

               (d) A receiver, trustee or custodian is appointed to, or does,
take title, possession or control of all, or substantially all, of Tenant's
assets;

               (e) An order for relief is entered against Tenant pursuant to
a voluntary or involuntary proceeding commenced under any chapter of the
Bankruptcy Code;

               (f) Any involuntary petition is filed against the Tenant under
any chapter of the Bankruptcy Code and is not dismissed within ninety (90) days;
or

               (g) Tenant's interest in this Lease is attached, executed
upon, or otherwise judicially seized and such action is not released within
ninety (90) days of the action.

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<PAGE>   32

               Notices given under this Section shall specify the alleged
default and shall demand that Tenant perform the provisions of this Lease or pay
the Rent that is in arrears, as the case may be, within the applicable period of
time, or quit the Premises. No such notice shall be deemed a forfeiture or a
termination of this Lease unless Landlord elects otherwise in such notice, and
in no event shall a forfeiture or termination occur without such written notice.

        24.5 In the event of a default by Tenant, and at any time thereafter,
and without limiting Landlord in the exercise of any right or remedy which
Landlord may have, Landlord shall be entitled to terminate Tenant's right to
possession of the Premises by any lawful means, in which case this Lease shall
terminate and Tenant shall immediately surrender possession of the Premises to
Landlord. In such event Landlord shall have the immediate right to re-enter and
remove all persons and property, and such property may be removed and stored in
a public warehouse or elsewhere at the cost of, and for the account of Tenant,
all without service of notice and without being deemed guilty of trespass, or
becoming liable for any loss or damage which may be occasioned thereby. In the
event that Landlord shall elect to so terminate this Lease, then Landlord shall
be entitled to recover from Tenant all damages incurred by Landlord by reason of
Tenant's default, including:

               (a) The worth at the time of award of any unpaid Rent which
had been earned at the time of such termination; plus

               (b) The worth at the time of award of the amount by which the
unpaid Rent which would have been earned after termination until the time of
award exceeds the amount of such rental loss which Tenant proves could have been
reasonably avoided; plus

               (c) The worth at the time of award of the amount by which the
unpaid Rent for the balance of the term after the time of award exceeds the
amount of such rental loss which Tenant proves could have been reasonably
avoided; plus

               (d) Any other amount necessary to compensate Landlord for all
the detriment proximately caused by Tenant's failure to perform its obligation
under this Lease or which in the ordinary course of things would be likely to
result therefrom, including, but not limited to, the cost of restoring the
Premises to the condition required under the terms of this Lease; plus

               (e) At Landlord's election, such other amounts in addition to
or in lieu of the foregoing as may be permitted from time to time by applicable
law.

               As used in subsections (a), (b) and (c), the "time of award"
shall mean the date upon which the judgment in any action brought by Landlord
against Tenant by reason of such default is entered or such earlier date as the
court may determine. As used in subsections (a) and (b), the "worth at the time
of award" shall be computed by allowing interest at the rate specified in
Section 24.1. As used in subsection (c) above, the "worth at the time of award"
shall be computed by taking the present value of such amount using the discount
rate of the Federal Reserve Bank of San Francisco at the time of award plus one
percentage point.

                                       29
<PAGE>   33

        24.6 In the event of a default by Tenant, and if Landlord does not elect
to terminate this Lease as provided in Section 24.5 or otherwise terminate
Tenant's right to possession of the Premises, Landlord may continue this Lease
in effect for so long as Landlord does not terminate Tenant's right to
possession of the Premises, and may enforce all of its rights and remedies under
the Lease, including the right from time to time to recover Rent as it becomes
due under the Lease. At any time thereafter, Landlord may elect to terminate
this Lease and to recover damages to which Landlord is entitled.

        24.7 Notwithstanding anything herein to the contrary, Landlord's reentry
to perform acts of maintenance or preservation of, or in connection with efforts
to relet, the Premises, or any portion thereof, or the appointment of a receiver
upon Landlord's initiative to protect Landlord's interest under this Lease,
shall not terminate Tenant's right to possession of the Premises or any portion
thereof and, until Landlord does elect to terminate this Lease, this Lease shall
continue in full force and Landlord may pursue all its remedies hereunder,
including, without limitation, the right to recover from Tenant as they become
due hereunder all Rent and other charges required to be paid by Tenant under the
terms of this Lease.

        24.8 All rights, options, and remedies of Landlord contained in this
Lease shall be construed and held to be nonexclusive and cumulative. Landlord
shall have the right to pursue any one or all of such remedies or any other
remedy or relief which may be provided by law, whether or not stated in this
Lease. No waiver of any default of Tenant hereunder shall be implied from any
acceptance by Landlord of any rent or other payments due hereunder or by any
omission by Landlord to take any action on account of such default if such
default persists or is repeated, and no express waiver shall affect defaults
other than as specified in said waiver.

        24.9 Termination of this Lease or Tenant's right to possession by
Landlord shall not relieve Tenant from any liability to Landlord which has
theretofore accrued or shall arise based upon events which occurred prior to the
last to occur of (i) the date of Lease termination or (ii) the date possession
of Premises is surrendered.

        24.10 Landlord shall not be in default unless Landlord fails to perform
obligations required of Landlord within a reasonable time, but in no event later
than thirty (30) days after written notice by Tenant specifying wherein Landlord
has failed to perform such obligation; provided, however, that if the nature of
Landlord's obligation is such that more than thirty (30) days are required for
performance, then Landlord shall not be in default if Landlord commences
performance within such thirty (30) day period and thereafter diligently
prosecutes the same to completion.

        24.11 In the event of any default on the part of Landlord, Tenant will
give notice by registered or certified mail to any beneficiary of a deed of
trust or mortgagee of a mortgage covering the Premises whose address shall have
been furnished to Tenant and shall offer such beneficiary and/or mortgagee a
reasonable opportunity to cure the default, including time to obtain possession
of the Premises by power of sale or a judicial action if such should prove
necessary to effect a cure, so long as the beneficiary or mortgagee shall have
cured all curable defaults and is diligently pursuing all reasonable steps to
obtain possession.

                                       30
<PAGE>   34

25.     ASSIGNMENT OR SUBLETTING.

        25.1 Except as hereinafter provided, Tenant shall not, either
voluntarily or by operation of law, sell, hypothecate or transfer this Lease, or
sublet the Premises or any part thereof, or permit or suffer the Premises or any
part thereof to be used or occupied as work space, storage space, concession or
otherwise by anyone other than Tenant or Tenant's employees, without the prior
written consent of Landlord in each instance, which consent shall not be
unreasonably withheld or delayed.

        25.2 If Tenant desires to assign this Lease to any entity into which
Tenant is merged, with which Tenant is consolidated, or which acquires all or
substantially all of the assets of Tenant, provided that the assignee first
executes, acknowledges and delivers to Landlord an agreement whereby the
assignee agrees to be bound by all of the covenants and agreements in this Lease
arising after the effective date of the transfer, then Landlord upon receipt of
proof of foregoing, will consent to the assignment.

        25.3 In the event Tenant desires to assign, hypothecate or otherwise
transfer this Lease or sublet the Premises or any part thereof to a transferee
other than one set forth in Section 25.2, then at least ten (10) days, but not
more than forty-five (45) days, prior to the date when Tenant desires the
assignment or sublease to be effective (the "Assignment Date"), Tenant shall
give Landlord a notice (the "Assignment Notice") which shall set forth the name,
address and business of the proposed assignee or sublessee, information
(including references and financial statements) concerning the reputation and
financial ability of the proposed assignee or sublessee, the Assignment Date,
any ownership or commercial relationship between Tenant and the proposed
assignee or sublessee, and the consideration and all other material terms and
conditions of the proposed assignment or sublease, all in such detail as
Landlord shall reasonably require.

        25.4 Landlord in making its determination as to whether consent should
be given to a proposed assignment or sublease, may give consideration to the
reputation of a proposed successor, the financial strength of such successor in
the case of a proposed assignment (notwithstanding the assignor remaining liable
for Tenant's performance), and any use which such successor proposes to make of
the Premises. If Landlord fails to deliver written notice of its determination
to Tenant within fifteen (15) days following receipt of the Assignment Notice
and the information required under Section 25.3, Landlord shall be deemed to
have approved the request. As a condition to any assignment to which Landlord
has given consent, any such assignee must execute, acknowledge and deliver to
Landlord an agreement whereby the assignee agrees to be bound by all of the
covenants and agreements in this Lease.

        25.5 Any sale, assignment, hypothecation or transfer of this Lease or
subletting of Premises that is not in compliance with the provisions of this
Article 25 shall be void.

        25.6 The consent by Landlord to an assignment or subletting shall not
relieve Tenant or any assignee of this Lease or sublessee of the Premises from
obtaining the consent of Landlord to any further assignment or subletting and
shall not release Tenant or any assignee or sublessee of Tenant from full and
primary liability.

                                       31
<PAGE>   35

        25.7 If Tenant shall sublet the Premises or any part thereof Tenant
hereby immediately and irrevocably assigns to Landlord, as security for Tenant's
obligations under this Lease, all rent from any subletting of all or a part of
the Premises, and Landlord as assignee of Tenant, or a receiver for Tenant
appointed on Landlord's application, may collect such rent and apply it toward
Tenant's obligations under this Lease; except that, until the occurrence of an
act of default by Tenant, Tenant shall have the right to collect such rent.

        25.8 Notwithstanding any subletting or assignment Tenant shall remain
fully and primarily liable for the payment of all Rent and other sums due, or to
become due hereunder, and for the full performance of all other terms,
conditions, and covenants to be kept and performed by Tenant. The acceptance of
rent or any other sum due hereunder, or the acceptance of performance of any
other term, covenant, or condition hereof, from any other person or entity shall
not be deemed to be a waiver of any of the provisions of this Lease or a consent
to any subletting or assignment of the Premises. Landlord shall not withhold
consent to an assignment back to the original Tenant hereunder from a subsequent
assignee.

        25.9 Any sublease of the Premises shall be subject and subordinate to
the provisions of this Lease, shall not extend beyond the term of this Lease,
and shall provide that the sublessee shall attorn to Landlord, at Landlord's
sole option, in the event of the termination of this Lease. Landlord and any
lender shall upon Tenant's request provide any subtenant of the entirety of the
Premises with a recognition and nondisturbance agreement in the form set forth
in Article 35 hereof on the condition that the sublessee agrees to attorn to
Landlord on exactly the same terms and conditions as this Lease.

        25.10 In the event Tenant assigns or otherwise transfers this Lease or
sublets the Premises to a transferee other than one set forth in Section 25.2,
Tenant shall pay to Landlord, as Additional Rent, fifty percent (50%) of the
rent and other consideration received from the transferee during the term of
this Lease (but "consideration" shall not include proceeds received by Tenant
from the sale of personal property) in excess of Rent payable to Landlord under
this Lease, after Tenant has recouped any reasonable commission, legal,
improvement and other out-of-pocket expenses occasioned by such transfer and
payable to third parties, and after Tenant has recouped any expenses incurred
for tenant improvements to the transferred space constructed after the Term
Commencement Date.

        25.11 Notwithstanding anything to the contrary contained in this Article
25, Landlord acknowledges and agrees that a portion of the Premises may be
occupied by the Northwest Hospital Department of Molecular Medicine ("Northwest
Hospital"), whose research is integrated with and affiliated with the
contemplated use of the Premises by Tenant. Subject to the provisions of Section
25.8, Tenant shall be entitled to sublet, license or otherwise allow Northwest
Hospital such use and occupancy of the Premises, and the provisions of Sections
25.7 and 25.10 shall not apply to any such subletting or use.

26.     ATTORNEY'S FEES

        26.1 If either party becomes a party to any action or proceeding
concerning this Lease, the Premises, or the Building or Project in which the
Premises are located, by reason of any act

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<PAGE>   36

or omission of the other party or its authorized representatives, and not by any
act or omission of the party that becomes a party to that litigation or any act
or omission of its authorized representatives, the party that causes the other
party to become involved in the litigation shall be liable to that party for
reasonable attorneys' fees, expert witness fees, and court costs incurred by it
in the litigation.

        26.2 If either party commences an action or proceeding against the other
party arising out of or in connection with this Lease, the prevailing party
shall be entitled to have and recover from the other party reasonable attorneys'
fees, expert witness fees and costs of suit.

27.     BANKRUPTCY.

        27.1 In the event a debtor or trustee under the Bankruptcy Code, or
other person with similar rights, duties and powers under any other law,
proposes to cure any default under this Lease or to assume or assign this Lease,
and is obliged to provide adequate assurance to Landlord that (i) a default will
be cured, (ii) Landlord will be compensated for its damages arising from any
breach of this Lease, or (iii) future performance under this Lease will occur,
then adequate assurance shall include any or all of the following, as determined
by the Bankruptcy Court: (a) those acts specified in the Bankruptcy Code or
other law as included within the meaning of adequate assurance; (b) a cash
payment to compensate Landlord for any monetary defaults or damages arising from
a breach of this Lease; (c) the credit worthiness and desirability, as a tenant,
of the person assuming this Lease or receiving an assignment of this Lease, at
least equal to Landlord's customary and usual credit worthiness requirements and
desirability standards in effect at the time of the assumption or assignment, as
determined by the Bankruptcy Court; and (d) the assumption or assignment of all
of Tenant's interest and obligations under this Lease.

28.     DEFINITION OF LANDLORD.

        28.1 The term "Landlord" as used in this Lease, so far as covenants or
obligations on the part of Landlord are concerned, shall be limited to mean and
include only Landlord or the successor-in-interest of Landlord under this Lease
at the time in question. In the event of any transfer, assignment or conveyance
of Landlord's title or leasehold, the Landlord herein named (and in case of any
subsequent transfers or conveyances, the then grantor and any prior grantors)
shall be automatically freed and relieved from and after the date of such
transfer, assignment or conveyance of all liability for the performance of any
covenants or obligations contained in this Lease thereafter to be performed by
Landlord and, without further agreement, the transferee of such title or
leasehold shall be deemed to have assumed and agreed to observe and perform any
and all obligations of Landlord hereunder, during its ownership of the Premises.
Landlord may transfer its interest in the Premises or this Lease without the
consent of Tenant and such transfer or subsequent transfer shall not be deemed a
violation on the part of Landlord or the then grantor of any of the terms or
conditions of this Lease.

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<PAGE>   37

29.     ESTOPPEL CERTIFICATE.

        29.1 Each party shall, within fifteen (15) days of written notice from
the other party, execute, acknowledge and deliver to the other party a statement
in writing on a form reasonably requested by a proposed lender, purchaser,
assignee or subtenant (i) certifying that this Lease is unmodified and in full
force and effect (or, if modified, stating the nature of such modification and
certifying that this Lease as so modified is in full force and effect) and the
dates to which the rental and other charges are paid in advance, if any, (ii)
acknowledging that there are not, to each party's knowledge, any uncured
defaults on the part of Landlord or Tenant hereunder (or specifying such
defaults if any are claimed) and (iii) setting forth such further information
with respect to this Lease or the Premises as may be reasonably requested
thereon. Any such statement may be relied upon by any prospective lender,
purchaser, assignee or subtenant of all or any portion of the Premises.

30.     REMOVAL OF PROPERTY.

        30.1 Except as provided below, all fixtures and personal property owned
by Tenant shall be and remain the property of Tenant, and may be removed by
Tenant at the expiration or earlier termination of the term of this Lease;
however, fume hoods, chemistry hoods, cabling for telecom and computers, package
HVAC units, and case work, including lab benches and sinks, may not be removed
by Tenant, even if paid for by Tenant in addition to the Tenant Improvement
Allowance. Notwithstanding the foregoing, the parties acknowledge that at the
expiration or earlier termination of the term of this Lease, Tenant and/or its
subtenants or other occupants may remove any fixtures and personal property
which is leased from an equipment leasing company or owned by Northwest
Hospital.

        30.2 The Project, Building and Tenant Improvements, and all fixtures and
personal property owned by Landlord, including all fixtures and improvements
paid from the Tenant Improvement Allowance, shall be and remain the property of
Landlord, and shall, upon the expiration or earlier termination of this Lease,
remain upon and be surrendered with the Premises as a part thereof.

        30.3 Notwithstanding Section 30.1, Tenant may not remove any property if
such removal would cause material damage to the Premises, unless such damages
can be and is repaired by Tenant. Furthermore, Tenant shall repair any damage to
the Premises caused by Tenant's removal of any such property, and shall, prior
to the expiration or earlier termination of this Lease, restore and return the
Premises to the condition they were in when first occupied by Tenant, reasonable
wear and tear excepted; provided, however, Tenant shall not be required to
restore and return any space later improved by Tenant to the condition it was in
when first occupied by Tenant if at the time of such later improvement Landlord
consents that the new improvements may remain in place at the termination of the
Lease in lieu of the replaced improvements, which consent shall not be
unreasonably withheld. At a minimum, even if they are determined to be fixtures
or personal property owned by Tenant, and except as set forth in Section 30.1,
Tenant shall leave in place and repair any damage to the interior floors, walls,
doors and ceilings of the Premises, and the heating, ventilation, air
conditioning, plumbing, and electrical systems; all such property shall become
the property of Landlord upon the expiration

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<PAGE>   38

or earlier termination of this Lease, and shall remain upon and be surrendered
with the Premises as a part thereof. The provisions of Article 17 shall apply to
any restoration work under this Article as if the restoration was an alteration,
addition or improvement thereunder. Should Tenant require any period beyond the
expiration or earlier termination of the Lease to complete such restoration,
Tenant shall be a tenant at sufferance subject to the provisions of Section 12.2
hereof.

        30.4 If Tenant shall fail to remove any fixtures or personal property
which it is entitled to remove under this Article 30 from the Premises prior to
termination of this Lease, then Landlord may dispose of the property under the
provisions of applicable law now or hereafter in effect.

31.     LIMITATION OF LANDLORD'S LIABILITY.

        31.1 If Landlord is in default of this Lease, and as a consequence,
Tenant recovers a money judgment against Landlord, the judgment shall be
satisfied only out of the proceeds of sale received on execution of the judgment
and levy against the right, title, and interest of Landlord in the Project of
which the Premises are a part, and out of rent or other income from the Project
receivable by Landlord or out of the consideration received by Landlord from the
sale or other disposition of all or any part of Landlord's right, title, and
interest in the Building and Project of which the Premises are a part, or by
offsetting Rent under this Lease.

        31.2 Neither Landlord nor Landlord's Agents shall be personally liable
for any deficiency except to the extent liability is based upon willful and
intentional misconduct. If Landlord is a partnership or joint venture, the
partners of such partnership shall not be personally liable and no partner of
Landlord shall be sued or named as a party in any suit or action, or service of
process be made against any partner of Landlord, except as may be necessary to
secure jurisdiction of the partnership or joint venture or to the extent
liability is caused by willful and intentional misconduct. If Landlord is a
corporation, the shareholders, directors, officers, employees, and/or agents of
such corporation shall not be personally liable and no shareholder, director,
officer, employee, or agent of Landlord shall be sued or named as a party in any
suit or action, or service of process be made against any shareholder, director,
officer, employee, or agent of Landlord, except as may be necessary to secure
jurisdiction of the corporation. If Landlord is a limited liability company, the
members, managers, officers, employees, and/or agents of such limited liability
company shall not be personally liable and no member, manager, officer,
employee, or agent of Landlord shall be sued or named as a party in any suit or
action, or service of process be made against any member, manager, officer,
employee, or agent of Landlord, except as may be necessary to secure
jurisdiction of the corporation. No partner, shareholder, director, member,
manager, employee, or agent of Landlord shall be required to answer or otherwise
plead to any service of process and no judgment will be taken or writ of
execution levied against any partner, shareholder, director, member, manager,
employee, or agent of Landlord.

        31.3 Each of the covenants and agreements of this Article 31 shall be
applicable to any covenant or agreement either expressly contained in this Lease
or imposed by statute or by common law.

                                       35
<PAGE>   39

32.     CONTROL BY LANDLORD.

        32.1 Landlord reserves full control over the Building and Project to the
extent not inconsistent with Tenant's quiet enjoyment and use of Premises. This
reservation includes the right to establish ownership of the buildings separate
from fee title to the real property underlying the Buildings, and to divide the
Project into more than one lot.

        32.2 Tenant shall, should Landlord so request, promptly join with
Landlord in execution of such documents as may be appropriate to assist Landlord
to implement any such action provided Tenant need not execute any document which
is of a nature wherein liability is created in Tenant or if by reason of the
terms of such document Tenant will be deprived of the quiet enjoyment and use of
the Premises as granted by this Lease.

33.     QUIET ENJOYMENT.

        33.1 So long as Tenant is not in default, Landlord covenants that
Landlord or anyone acting through or under Landlord will not disturb Tenant's
occupancy of the Premises except as permitted by the provisions of this Lease
and that Landlord shall use reasonable efforts to enforce the lease obligations
of tenants of the balance of the Building and Project to the extent they might
otherwise disturb Tenant's occupancy.

34.     QUITCLAIM DEED.

        34.1 Tenant shall execute and deliver to Landlord on the expiration or
termination of this Lease, immediately on Landlord's request, a quitclaim deed
to the Premises and Project or other document in recordable form suitable to
evidence of record termination of this Lease and the right of first refusal and
option contained herein.

35.     SUBORDINATION AND ATTORNMENT.

        35.1 Unless the mortgagee or beneficiary elects otherwise at any time
prior to or following a default by Tenant, this Lease shall be subject to and
subordinate to the lien of any mortgage or deed of trust now or hereafter in
force against the Project and Building of which the Premises are a part, and to
all advances made or hereafter to be made upon the security thereof without the
necessity of the execution and delivery of any further instruments on the part
of Tenant to effectuate such subordination, provided that the lienholder,
beneficiary, or mortgagee has previously executed and delivered to Tenant a
nondisturbance, attornment, and subordination agreement in such form as the
lienholder, beneficiary, or mortgagee may reasonably request and as the Tenant
may approve, which approval will not be unreasonably withheld, setting forth
that so long as Tenant is not in default hereunder, Landlord's and Tenant's
rights and obligations hereunder shall remain in force and Tenant's right to
possession shall be upheld. Furthermore, Landlord shall provide to Tenant,
concurrently with Landlord's acquisition of the Project, a non-disturbance
agreement from the beneficiary of a deed of trust which Landlord grants to
finance the acquisition and renovation of the Project.

                                       36
<PAGE>   40

        35.2 Notwithstanding the foregoing, Tenant shall execute and deliver
upon demand such further instrument or instruments evidencing such subordination
of this Lease to the lien of any such mortgage or deed of trust as may be
required by Landlord and in a form reasonably satisfactory to Tenant, provided
that the lienholder, beneficiary, or mortgagee has previously or concurrently
therewith executed and delivered to Tenant a non-disturbance agreement in
recordable form. However, if any such mortgagee or beneficiary so elects at any
time prior to or following a default by Tenant, this Lease shall be deemed prior
in lien to any such mortgage or deed of trust regardless of date and Tenant will
execute a statement in writing to such effect at Landlord's request in a form
reasonably satisfactory to Tenant.

        35.3 In the event any proceedings are brought for foreclosure, or in the
event of the exercise of the power of sale under any mortgage or deed of trust
made by the Landlord covering the Premises, the Tenant shall at the election of
the purchaser at such foreclosure or sale attorn to the purchaser upon any such
foreclosure or sale and recognize such purchaser as the Landlord under this
Lease in accordance with the terms of the non-disturbance Agreement.

36.     SURRENDER.

        36.1 No surrender of possession of any part of the Premises shall
release Tenant from any of its obligations hereunder unless accepted by Landlord
in writing.

        36.2 The voluntary or other surrender of this Lease by Tenant shall not
work a merger, unless Landlord consents, and shall, at the option of Landlord,
operate as an assignment to it of any or all subleases or subtenancies.

37.     WAIVER AND MODIFICATION.

        37.1 No provision of this Lease may be modified, amended or added to
except by an agreement in writing. The waiver by Landlord of any breach of any
term, covenant or condition herein contained shall not be deemed to be a waiver
of any subsequent breach of the same or any other term, covenant or condition
herein contained.

38.     WAIVER OF JURY TRIAL.

        38.1 The parties hereto shall and they hereby do waive trial by jury in
any action, proceeding or counterclaim brought by either of the parties hereto
against the other on any matters whatsoever arising out of or in any way
connected with this Lease, the relationship of Landlord and Tenant, Tenant's use
or occupancy of the Premises, and/or any claim of injury or damage.

39.     HAZARDOUS MATERIAL.

        39.1 During the term, Tenant, at its sole cost, shall comply with all
federal, state and local laws, statutes, ordinances, codes, regulations and
orders relating to the receiving, handling, use, storage, accumulation,
transportation, generation, spillage, migration, discharge, release and disposal
of Hazardous Material (as defined below) in or about the Project. Tenant shall
not

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<PAGE>   41

cause or permit any Hazardous Material to be brought upon, kept or used in or
about the Project by Tenant, its agents, employees, contractors, invitees or
subtenants, in a manner or for a purpose prohibited by any federal, state or
local agency or authority. The accumulation of Hazardous Material shall be in
approved containers and removed from the Project by duly licensed carriers.

        39.2 Tenant shall immediately provide Landlord with telephonic notice,
which shall promptly be confirmed by written notice, of any and all spillage,
discharge, release and disposal of Hazardous Material onto or within the
Project, including the soils and subsurface waters thereof, which by law must be
reported to any federal, state or local agency, and any injuries or damages
resulting directly or indirectly therefrom. Further, Tenant shall deliver to
Landlord each and every notice or order, when said order or notice identifies a
violation which may have the potential to adversely impact the Project, received
from any federal, state or local agency concerning Hazardous Material and the
possession, use and/or accumulation thereof promptly upon receipt of each such
notice or order by Tenant. Landlord shall have the right, upon reasonable
notice, to inspect and copy each and every notice or order received from any
federal, state or local agency concerning Hazardous Material and the possession,
use and/or accumulation thereof.

        39.3 Tenant shall be responsible for and shall indemnify, protect,
defend and hold harmless Landlord and Landlord's Agents from any and all
liability, damages, injuries, causes of action, claims, judgments, costs,
penalties, fines, losses, and expenses which arise during or after the term of
this Lease and which result from Tenant's (or from Tenant's Agents, assignees,
subtenants, employees, agents, contractors, licensees, or invitees) receiving,
handling, use, storage, accumulation, transportation, generation, spillage,
migration, discharge, release or disposal of Hazardous Material in, upon or
about the Project, including without limitation (i) diminution in value of the
Project or any portion of the Project, (ii) damages for the loss or restriction
on use of any portion or amenity of the Project or Project, (iii) damages
arising from any adverse impact on marketing of space in the Project or the
Project, (iv) damages and the costs of remedial work to other property in the
vicinity of the Project incurred by Landlord or an affiliate of Landlord, and
(v) reasonable consultant fees, expert fees, and attorneys' fees. Landlord shall
be responsible for and shall indemnify, protect, defend and hold harmless Tenant
and Tenant's Agents on the same basis as above for any claims which result from
Landlord's or from Landlord's Agents receiving, handling, use, storage,
accumulation, transportation, generation, spillage, migration, discharge,
release or disposal of Hazardous Material in, upon or about the Project.

        39.4 The indemnification pursuant to the preceding Section 39.3
includes, without limiting the generality of Section 39.3, reasonable costs
incurred in connection with any investigation of site conditions or any cleanup,
remedial, removal or restoration work required by any federal, state or local
governmental agency or political subdivision because of Hazardous Material
present in the soil, subsoil, ground water, or elsewhere on, under or about the
Project, or on, under or about any other property in the vicinity of the
Project. Without limiting the foregoing, if the presence of any Hazardous
Material on the Project caused or permitted by Tenant results in any
contamination of the Project, or underlying soil or groundwater, Tenant shall
promptly take all actions at its sole expense as are necessary to return the
Project to that condition required by applicable law, provided that Landlord's
approval of such action shall first

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<PAGE>   42

be obtained, which approval shall not be unreasonably withheld, except that
Tenant shall not be required to obtain Landlord's prior approval of any action
of an emergency nature reasonably required or any action mandated by a
governmental authority, but Tenant shall give Landlord prompt notice thereof.

        39.5 Landlord acknowledges that it is not the intent of this Article 39
to prohibit Tenant from operating its business as described in Article 10 or to
interfere with the operation of Tenant's business. Tenant may operate its
business according to the custom of the industry so long as the use or presence
of Hazardous Material is strictly and properly monitored according to all
applicable governmental requirements. As a material inducement to Landlord to
allow Tenant to use Hazardous Material in connection with its business, Tenant
agrees to make available to Landlord upon reasonable request a list identifying
each type of Hazardous Material to be present in or upon the Project and setting
forth any and all governmental approvals or permits required in connection with
the presence of Hazardous Material on the Project ("Hazardous Material
Summary"). At Landlord's request, and at reasonable times, Tenant shall make
available to Landlord the latest available Hazardous Materials Summary and true
and correct copies of the following documents (hereinafter referred to as the
"Hazardous Material Documents") relating to the handling, storage, disposal and
emission of Hazardous Material: permits; approvals; reports and correspondence;
storage and management plans; notice of violations of any laws; plans relating
to the installation of any storage tanks to be installed in or under the Project
(provided said installation of tanks shall be permitted only after Landlord has
given Tenant its written consent to do so, which consent may not be unreasonably
withheld); and all closure plans or any other documents required by any and all
federal, state and local governmental agencies and authorities for any storage
tanks installed in, on or about the Project for the closure of any such tanks.
Tenant shall not be required, however, to provide Landlord with that portion of
any document which contains information of a proprietary nature and which, in
and of itself, does not contain a reference to any Hazardous Material which are
not otherwise identified to Landlord in such documentation, unless any such
Hazardous Material Document names Landlord as an "owner" or "operator" of the
facility in which Tenant is conducting its business. It is not the intent of
this subsection to provide Landlord with information which could be detrimental
to Tenant's business should such information become possessed by Tenant's
competitors. Landlord shall treat all information furnished by Tenant to
Landlord pursuant to this Section 39.5 as confidential and shall not disclose
such information to any person or entity without Tenant's prior written consent,
which consent shall not be unreasonably withheld or delayed, except as required
by law.

        39.6 Notwithstanding other provisions of this Article 39, it shall be a
default under this Lease, and Landlord shall have the right to terminate the
Lease and/or pursue its other remedies under Article 24, in the event that (i)
Tenant's use of the Premises for the generation, storage, use, treatment or
disposal of Hazardous Material is in a manner or for a purpose prohibited by
applicable law unless Tenant is diligently pursuing compliance with such law,
(ii) Tenant has been required by any governmental authority to take remedial
action in connection with Hazardous Material contaminating the Project if the
contamination resulted from Tenant's action or use of the Premises, unless
Tenant is diligently pursuing compliance with such requirement or is protesting
or appealing such requirement in good faith, or (iii) Tenant is subject to an
enforcement order issued by any governmental authority in connection with
Tenant's use,

                                       39
<PAGE>   43

disposal or storage of a Hazardous Material on the Project, unless Tenant is
diligently seeking compliance with such enforcement order or is protesting or
appealing such order in good faith.

        39.7 Notwithstanding the provisions of Article 25, if (i) any
anticipated use of the Premises by a proposed assignee or subtenant involves the
generation or storage, use, treatment or disposal of Hazardous Material in any
manner or for a purpose prohibited by any applicable law, or (ii) the proposed
assignee or sublessee is subject to a final, unappealable enforcement order
issued by any governmental authority in connection with such party's use,
disposal or storage of Hazardous Material of a type such proposed assignee or
sublessee intends to use in the Premises and shall have failed to materially
comply with such order, it shall not be unreasonable for Landlord to withhold
its consent to an assignment or subletting to such proposed assignee or
sublessee.

        39.8 Landlord represents that, to the best of its knowledge, as of the
date of this Lease, there is no Hazardous Material on the Project. Landlord has
provided Tenant with a Phase I Environmental Site Assessment dated September 1,
1999, by Earth Consultants, Inc., and will provide to Tenant an update of the
environmental site assessment as of the date Landlord tenders possession of the
Premises to Tenant for construction of the Tenant Improvements. Should the
environmental site assessment(s) disclose the presence of Hazardous Material
beyond legally permissible levels, Landlord shall correct the deficiencies to
Tenant's reasonable satisfaction and shall cause updates to the environmental
site assessment(s) to be issued reflecting the remedy. The environmental site
assessment(s) and all updates thereto are hereinafter referred to as the "Base
Line Report," and shall be deemed conclusive as to the condition of the Project,
unless, within ninety (90) days after the date of execution hereof, Tenant
causes an inspection of its own to be conducted, which inspection discloses the
presence of Hazardous Material materially different from that disclosed in the
Base Line Report.

        39.9 At any time prior to the expiration or earlier termination of the
term of the Lease, Landlord shall, upon reasonable prior notice to Tenant, have
the right to enter upon the Premises at all reasonable times and at reasonable
intervals in order to conduct appropriate tests regarding the presence, use and
storage of Hazardous Material, and to inspect Tenant's records with regard
thereto. Tenant will pay the reasonable costs of any such test which
demonstrates that contamination in excess of permissible levels has occurred and
such contamination was caused by Tenant's use of the Project during the term of
the Lease. Tenant shall correct any deficiencies identified in any such tests in
accordance with its obligations under this Article 39 to the extent the
deficiencies are the result of Tenant's use of the Project during the term of
this Lease.

        39.10 Tenant shall at its own expense cause an environmental site
assessment of the Premises to be conducted and a report thereof delivered to
Landlord upon the expiration or earlier termination of the Lease, such report to
be as complete and broad in scope as is necessary to identify any impact on the
Project Tenant's operations might have had (hereinafter referred to as the "Exit
Report"). In order to facilitate the Exit Report, Tenant shall install, as part
of the Tenant Improvements, a sampling port on the sewer drain from the
Premises. Tenant shall correct any deficiencies identified in the Exit Report in
accordance with its obligations under this Article 39 prior to the expiration or
earlier termination of this Lease. This Article 39 is the exclusive provision in
this Lease regarding clean-up, repairs or maintenance arising from

                                       40
<PAGE>   44

receiving, handling, use, storage, accumulation, transportation, generation,
spillage, migration, discharge, release or disposal of Hazardous Material in,
upon or about the Project, and the provisions of Articles 7, 10, 18, and 20
shall not apply thereto.

        39.11 Landlord's and Tenant's obligations under this Article 39 shall
survive the termination of the Lease.

        39.12 As used herein, the term "Hazardous Material" means any hazardous
or toxic substance, material or waste which is or becomes regulated by any local
governmental authority, the State of Washington or the United States Government.
The term "Hazardous Material" includes, without limitation, any material or
substance which is (i) petroleum, (ii) asbestos, (iii) designated as a
"hazardous substance" pursuant to Section 311 of the Federal Water Pollution
Control Act (33 U.S.C. Section 1317), (iv) defined as a "hazardous waste"
pursuant to Section 1004 of the Federal Resource Conservation and Recovery Act,
42 U.S.C. Section 6901, et seq. (42 U.S.C. Section 6903), or (v) defined as a
"hazardous substance" pursuant to Section 101 of the Comprehensive Environmental
Response Compensation and Liability Act, 42 U.S.C. Section 9601 et seq. (42
U.S.C. Section 9601).

40.     OPTION TO EXTEND TERM.

        40.1 Landlord grants to Tenant the right to extend the term of this
Lease for two (2) separate five (5) year periods under the same terms and
conditions existing in the original Lease except as set forth in this Article
40. Tenant shall exercise such right to extend the term of this Lease by written
notice to Landlord given no later than nine (9) months prior to the end of the
original term or the first extension term of this Lease, as the case may be. The
second extension option shall lapse and have no further force or effect if the
first extension option is not exercised, and there shall be no right to extend
the term beyond said two (2) extension periods.

        40.2 Basic Annual Rent shall be adjusted on the first day of each
extension term to the fair market rental value of the Premises as of the
commencement of the extension term.

        40.3 Landlord and Tenant shall attempt in good faith to agree on the
fair market rental value of the Premises as of the commencement of the extension
term, within thirty (30) days after Tenant shall have exercised its right to
extend the term. If the parties do not agree within such thirty (30) day period,
Landlord shall obtain within thirty (30) days at its expense and deliver to
Tenant an independent appraisal of the fair market rental value of the Premises
as of the commencement of the extension term. Following its receipt of
Landlord's appraisal, Tenant may elect to obtain within thirty (30) days
thereafter at its expense and deliver to Landlord a second independent appraisal
of the fair market rental value of the Premises as of the commencement of the
extension term. If Tenant elects not to obtain a second appraisal, Landlord's
appraisal shall be conclusive. If Tenant's appraisal is no more than five
percent (5%) less than Landlord's appraisal, the fair market rental value of the
Premises shall be the arithmetic average of the two appraisals. If Tenant's
appraisal is more than five percent (5%) less than Landlord's appraisal, the two
appraisers shall appoint a third independent appraiser to appraise the fair
market rental value of the Premises as of the commencement of the extension
term, and the fair market rental value of the Premises shall be the arithmetic
average of the two appraisals

                                       41
<PAGE>   45

closest in their determination of fair market rental value. Landlord and Tenant
shall bear equally the expense of the third appraiser.

        40.4 All appraisers appointed hereunder shall have at least ten (10)
years' experience in the appraisal of commercial and industrial real property in
the general area of the Premises, and shall be members of professional
organizations such as the American, Appraisal Institute with a designation of
MAI or equivalent.

        40.5 As used herein, the term "fair market rental value of the Premises"
shall mean the base rent that a ready and willing tenant would pay for similarly
improved space in the general area of the Premises, as of the commencement of
each extension term, to a ready and willing landlord, for a term of five (5)
years on the terms and conditions of the Lease, determined as if the Premises
were exposed for lease on the open market for a reasonable period of time and
taking into account all of the purposes for which such property may be used. Any
appraiser appointed hereunder to determine the "fair market rental value of the
Premises" shall take into account all of the other terms and conditions of this
Lease; provided, however, the appraiser shall not take into account the annual
rental increases provided for in Section 6.1, and Basic Annual Rent during the
extension term shall be periodically increased only if and to the extent the
appraiser includes such increases in the determination of the fair market rental
value of the Premises.

        40.6 Any increase in Basic Annual Rent under this Article 40 which is
not determined until after the effective date of the increase shall nevertheless
be retroactive to the effective date, and Tenant shall pay any such retroactive
increase with the installment of Rent next due.

        40.7 Tenant shall not have the right to exercise the option to extend
the term, notwithstanding anything set forth above to the contrary: (a) during
the time commencing from the date Landlord gives to Tenant a written notice that
Tenant is in default under any provision of this Lease and continuing until the
default alleged in said notice is cured; or (b) after the expiration or earlier
termination of this Lease. The period of time within which the option to extend
may be exercised shall not be extended or enlarged by reason of the Tenant's
inability to exercise the option because of the foregoing provisions. At the
election of Landlord, all rights of Tenant under the provisions of this Article
40 shall terminate and be of no further force or effect even after Tenant's due
and timely exercise of an option to extend if, after such exercise, but prior to
the commencement of the extension term, (1) Tenant fails to pay to Landlord a
monetary obligation of Tenant after such obligation becomes due for a period of
thirty (30) days after Landlord gives notice to Tenant of such default, or (2)
Tenant fails to commence to cure a non-monetary default within thirty (30) days
after the date Landlord gives notice to Tenant of such default.

41.     RIGHT OF FIRST REFUSAL TO LEASE ADDITIONAL SPACE.

        41.1 If at any time during the term of this Lease Landlord determines to
lease all or any part of the balance of 5,176 square feet of mezzanine level
space directly above the northernmost 5,176 square feet of the first floor space
within the Premises, Landlord shall give written notice to Tenant ("Right of
First Refusal Notice") of the economic terms and conditions on which

                                       42
<PAGE>   46

Landlord would be willing to lease all or any part of the balance of the space.
If Tenant, within fifteen (15) days after receipt of Landlord's Right of First
Refusal Notice, agrees in writing to lease all (but no less than all) of the
balance of the space on the terms and conditions stated in the notice, Landlord
shall lease the space to Tenant on the economic terms and conditions stated in
the notice.

        41.2 If Tenant does not agree in writing to lease all (but not less than
all) of the balance of the space described in Section 41.1 above within fifteen
(15) days after receipt of Landlord's Right of First Refusal Notice, or if
Landlord and Tenant have not entered into a lease agreement within thirty (30)
days thereafter, Landlord shall have the right to lease the space to a third
party on economic terms and conditions no more favorable than the economic terms
and conditions stated in the Right of First Refusal Notice. If Landlord does not
lease such space to the prospective tenant within one hundred eighty (180) days
after the Right of First Refusal Notice, any lease transaction thereafter shall
be deemed a new determination by Landlord to lease the space and the provisions
of this Section shall again be applicable.

        41.3 The Right of First Refusal herein granted to Tenant is not
assignable separate and apart from this Lease.

        41.4 Tenant shall not have the right to exercise the Right of First
Refusal, notwithstanding anything set forth above to the contrary: (a) During
the time commencing from the date Landlord gives to Tenant a written notice that
Tenant is in default under any provision of this Lease and continuing until the
default alleged in said notice is cured; or (b) After the expiration or earlier
termination of this Lease. The period of time within which the Right of First
Refusal may be exercised shall not be extended or enlarged by reason of the
Tenant's inability to exercise the Right of First Refusal because of the
foregoing provisions. At the election of Landlord, all rights of Tenant under
the provisions of this Article 41 shall terminate and be of no further force or
effect even after Tenant's due and timely exercise of the Right of First
Refusal, if, after such exercise, but prior to the execution of said lease, (1)
Tenant fails to pay to Landlord a monetary obligation of Tenant after such
obligation becomes due for a period of thirty (30) days after Landlord gives
notice to Tenant of such default, or (2) Tenant fails to commence to cure a
non-monetary default within thirty (30) days after the date Landlord gives
notice to Tenant of such default.

        41.5 The Right of First Refusal is continuing, in that if Tenant fails
to exercise the Right of First Refusal with regard to any particular space, the
Right of First Refusal shall nevertheless apply to that particular space if
Landlord determines to lease all or any part of such space at any later time,
and to any other space which Landlord determines to lease in the Building.

42.     MISCELLANEOUS.

        42.1 TERMS AND HEADINGS. Where applicable in this Lease, the singular
includes the plural and the masculine or neuter includes the masculine, feminine
and neuter. The section headings of this Lease are not a part of this Lease and
shall have no effect upon the construction or interpretation of any part hereof.

                                       43
<PAGE>   47

        42.2 EXAMINATION OF LEASE. Submission of this instrument for examination
or signature by Tenant does not constitute a reservation of or option for lease,
and it is not effective as a lease or otherwise until execution by and delivery
to both Landlord and Tenant.

        42.3 TIME. Time is of the essence with respect to the performance of
every provision of this Lease in which time of performance is a factor.

        42.4 COVENANTS AND CONDITIONS. Each provision of this Lease performable
by Tenant shall be deemed both a covenant and a condition.

        42.5 CONSENTS. Whenever consent or approval of either party is required,
that party shall not unreasonably withhold or delay such consent or approval,
except as may be expressly set forth to the contrary.

        42.6 ENTIRE AGREEMENT. The terms of this Lease are intended by the
parties as a final expression of their agreement with respect to the terms as
are included herein, and may not be contradicted by evidence of any prior or
contemporaneous agreement.

        42.7 SEVERABILITY. Any provision of this Lease which shall prove to be
invalid, void, or illegal in no way affects, impairs or invalidates any other
provision hereof, and such other provisions shall remain in full force and
effect.

        42.8 RECORDING. Within ten (10) days from the execution of this Lease,
Landlord and Tenant shall record a short form memorandum hereof, subject to the
requirement to execute and deliver a quitclaim deed pursuant to the provisions
of Section 34.1 hereof.

        42.9 IMPARTIAL CONSTRUCTION. The language in all parts of this Lease
shall be in all cases construed as a whole according to its fair meaning and not
strictly for or against either Landlord or Tenant.

        42.10 INUREMENT. Each of the covenants, conditions, and agreements
herein contained shall inure to the benefit of and shall apply to and be binding
upon the parties hereto and their respective heirs, legatees, devisees,
executors, administrators, successors, assigns, sublessees, or any person who
may come into possession of said Premises or any part thereof in any manner
whatsoever. Nothing in this Section 41.10 contained shall in any way alter the
provisions against assignment or subletting in this Lease provided.

        42.11 FORCE MAJEURE. If either party cannot perform any of its
obligations (other than Tenant's obligation to pay Rent), or is delayed in such
performance (other than Tenant's obligation to pay Rent), due to events beyond
such party's control, the time provided for performing such obligations shall be
extended by a period of time equal to the delay attributable to such events.
Events beyond a party's control include, but are not limited to, acts of God
(including earthquake), war, civil commotion, labor disputes, strikes, fire,
flood or other casualty, shortage of labor or material, government regulation or
restriction and weather conditions, but do not include financial inability to
perform.

                                       44
<PAGE>   48

        42.12 NOTICES. Any notice, consent, demand, bill, statement, or other
communication required or permitted to be given hereunder must be in writing and
may be given by personal delivery or by registered or certified mail, return
receipt requested, and if given by personal delivery shall be deemed given on
the date of delivery, and if given by mail shall be deemed sufficiently given
three (3) business days after time when deposited in United States Mail if sent
by registered or certified mail, addressed to Tenant at the Premises, or to
Tenant or Landlord at the addresses shown in Section 2.1.10 hereof. Either party
may, by notice to the other given pursuant to this Section, specify additional
or different addresses for notice purposes.

        42.13 AUTHORITY TO EXECUTE LEASE. Landlord and Tenant each acknowledge
that it has all necessary right, title and authority to enter into and perform
its obligations under this Lease, that this Lease is a binding obligation of
such party and has been authorized by all requisite action under the party's
governing instruments, that the individuals executing this Lease on behalf of
such party are duly authorized and designated to do so, and that no other
signatories are required to bind such party.

        42.14 GOVERNING LAW. This Lease shall be construed and enforced pursuant
to the law of the State of Washington.

43. DEFINITIONS. Capitalized terms not defined elsewhere in this Lease shall
have the meaning set forth below:

        43.1 "PREMISES" shall have the meaning ascribed to it in Section 1.1.

        43.2 "SITE IMPROVEMENTS." The exterior improvements, to include surface
parking areas, landscaping, drainage, irrigation, gutters, sidewalks, exterior
lighting, walkways, driveways and other improvements and appurtenances relating
to ingress and egress.

        43.3 "SITE PLAN." The site plan attached hereto as Exhibit "A".

        43.4 "BUILDING." The Building Shell and the Tenant Improvements.

        43.5 "BUILDING SHELL." The shell of the Building, consisting of a two
story concrete tilt-up structure, footings, foundations, floors, exterior walls,
and roof, with building electrical service, natural gas, telephone, water,
plumbing, and other utilities necessary for the Tenant Improvements extended
from the street and stubbed to the Building.

        43.6 "TENANT IMPROVEMENTS." The initial improvements within the Building
Shell desired by Tenant for occupancy and use of the entire Premises by Tenant.

        43.7 "TENANT IMPROVEMENT PLANS." The plans and specifications for the
Tenant Improvements.

        43.8 "PROJECT." The Site Improvements, the Building Shell, and the
Tenant Improvements, and the real property upon which the foregoing are located.

                                       45
<PAGE>   49

        43.9 "TENANT IMPROVEMENT ALLOWANCE" shall have the meaning ascribed to
it in Section 4.3.

        IN WITNESS WHEREOF, the parties hereto have executed this Lease as of
the date first above written.

                                      LANDLORD:

                                      NEXUS CANYON PARK LLC
                                      A California limited liability company
                                      By Nexus Properties, Inc.
                                      A California corporation
                                      Its Manager

                                      By
                                        ----------------------------------------
                                          Michael J. Reidy
                                          Chief Executive Officer

                                      TENANT:

                                      NORTHWEST BIOTHERAPEUTICS, INC.
                                      A Delaware corporation

                                      By
                                        ----------------------------------------
                                        Daniel O. Wilds
                                        President and CEO

                                       46
<PAGE>   50

                                 ACKNOWLEDGMENT

STATE OF CALIFORNIA              )
                                 ) ss.
COUNTY OF SAN DIEGO              )

        On October __, 1999, before me, ________________________________, Notary
Public, personally appeared MICHAEL J. REIDY, personally known to me to be the
person whose name is subscribed to the within instrument and acknowledged to me
that he executed the same in his authorized capacity, and that by his signature
on the instrument the person, or the entity upon behalf of which the person
acted, executed the instrument.

WITNESS my hand and official seal.

------------------------------------
Signature

STATE OF WASHINGTON              )
                                 ) ss
COUNTY OF SNOHOMISH              )

        On October ___, 1999, before me, ____________________________, Notary
Public, personally appeared __________________________________, personally known
to me or proved to me on the basis of satisfactory evidence to be the person(s)
whose name(s) is/are subscribed to the within instrument and acknowledged to me
that he/she/they executed the same in his/her/their authorized capacity(ies),
and that by his/her/their signature(s) on the instrument the person(s), or the
entity upon behalf of which the person(s) acted, executed the instrument.

                                        ----------------------------------------

        Subscribed and sworn to before me on ______________________.

                                     Print Name:_______________________________

                                     NOTARY PUBLIC for the State of Washington,
                                     residing at ______________________________

                                     My appointment expires: __________________

                                       47
<PAGE>   51

                                   EXHIBIT "A"

                            SITE PLAN OF THE PROJECT

                                       48
<PAGE>   52

                                   EXHIBIT "B"

                             OUTLINE OF THE PREMISES

                                       49
<PAGE>   53

                                   EXHIBIT "C"

                      DESCRIPTION OF LANDLORD IMPROVEMENTS

                                       50
<PAGE>   54

                                   EXHIBIT "D"

                            FORM OF LETTER OF CREDIT

                                       51
<PAGE>   55

                                   EXHIBIT "E"

                              RULES AND REGULATIONS

        NOTHING IN THESE RULES AND REGULATIONS SHALL SUPPLANT ANY PROVISION OF
        THE LEASE. IN THE EVENT OF A CONFLICT OR INCONSISTENCY BETWEEN THESE
        RULES AND REGULATIONS AND THE LEASE, THE LEASE SHALL PREVAIL.

1.      Except as specifically provided in the Lease to which these Rules and
        Regulations are attached, no sign, placard, picture, advertisement, name
        or notice shall be installed or displayed on any part of the outside of
        the Premises or the Building without the prior written consent of
        Landlord. Landlord shall have the right to remove, at Tenant's expense
        and without notice, any sign installed or displayed in violation of this
        rule.

2.      If Landlord objects in writing to any curtains, blinds, shades, screens
        or hanging plants or other similar objects attached to or used in
        connection with any window or door of the Premises, or placed on any
        windowsill, which is visible from the exterior of the Premises, and
        which is not included in approved Tenant Improvement Plans, Tenant shall
        remove said object.

3.      Tenant shall not obstruct any sidewalks or entrances to the Building, or
        any halls, passages, exits, entrances, or stairways within the Premises
        which are required to be kept clear for health and safety reasons.

4.      No deliveries shall be made which impede or interfere with other tenants
        or the operation of the Project.

5.      Tenant shall not place a load upon any floor of the Premises which
        exceeds the load per square foot which such floor was designed to carry
        and which is allowed by law. Fixtures and equipment which cause noise or
        vibration that may be transmitted to the structure of the Building to
        such a degree as to be objectionable to other tenants shall be placed
        and maintained by Tenant, at Tenant's expense, on vibration eliminators
        or other devices sufficient to eliminate such noise or vibration or
        reduce such noise and vibration to acceptable levels.

6.      Tenant shall not use any method of heating or air-conditioning other
        than that shown in approved Tenant Improvement Plans.

7.      Tenant shall not install any radio or television antenna, loudspeaker or
        other devices on the roof or exterior walls of the Premises without
        Landlord's consent, which shall not be unreasonably withheld or delayed.
        Tenant shall not interfere with radio or television broadcasting or
        reception from or in the Premises or elsewhere.

                                       52
<PAGE>   56

8.      Canvassing, peddling, soliciting and distribution of handbills or any
        other written material in the Project outside of the Premises are
        prohibited, and Tenant shall cooperate to prevent such activities.

9.      Tenant shall store all its trash, garbage and Hazardous Material within
        its Premises or in designated receptacles outside of the Premises.
        Tenant shall not place in any such receptacle any material which cannot
        be disposed of in the ordinary and customary manner of trash, garbage
        and Hazardous Material disposal.

10.     The Premises shall not be used for any improper, immoral or objectional
        purpose. No cooking shall be done or permitted on the Premises, except
        that use by Tenant of Underwriter's Laboratory approved equipment for
        brewing coffee, tea, hot chocolate and similar beverages or use of
        microwave ovens for employees use shall be permitted, or equipment shown
        on approved Tenant Improvement Plans, provided that such equipment and
        use is in accordance with all applicable federal, state, county and city
        laws, codes, ordinances, rules and regulations.

11.     Without the written consent of the Landlord, Tenant shall not use the
        name of the Project, if any, in connection with or in promoting or
        advertising the business of Tenant except as Tenant's address.

12.     Tenant shall comply with all safety, fire protection and evacuation
        procedures and regulations established by Landlord or any governmental
        agency.

13.     Tenant assumes any and all responsibility for protecting its Premises
        from theft, robbery and pilferage, which includes keeping doors locked
        and other means of entry to the Premises closed.

14.     Landlord may waive any one or more of these Rules and Regulations for
        the benefit of Tenant or any other tenant, but no such waiver by
        Landlord shall be construed as a waiver of such Rules and Regulations in
        favor of Tenant or any other Tenant, nor prevent Landlord from
        thereafter enforcing any such Rules and Regulations against any or all
        of the tenants of the Project.

15.     These Rules and Regulations are in addition to, and shall not be
        construed to in any way modify or amend, in whole or in part, the terms,
        covenants, agreements and conditions of the Lease.

16.     Landlord reserves the right to make such other and reasonable rules and
        regulations as, in its judgment, may from time to time be needed for
        safety and security, for care and cleanliness of the Project, and for
        the preservation of good order therein, subject to prior notice to
        Tenant and Tenant's consent, which will not be unreasonably withheld,
        conditioned or delayed. Tenant agrees to abide by all such Rules and
        Regulations hereinabove stated and any additional rules and regulations
        which are adopted.

                                       53
<PAGE>   57

17.     Tenant shall be responsible for the observance of all of the foregoing
        rules by Tenant's employees, agents, clients, customers, invitees and
        guests.

                                       54
<PAGE>   58

                                   EXHIBIT "F

                          CALCULATION OF RENTABLE AREA

                                       55

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