Exhibit 10.95



          RESEARCH AND ASSIGNMENT AND LICENSE AGREEMENT

     This Research and Assignment and License Agreement (this

"Agreement") is effective as of February 24, 1999 ("the EFFECTIVE

DATE") by and between Ixsys, Inc., a Delaware corporation, having

an address at 3520 Dunhill Road, San Diego, CA 92121 ("IXSYS"),

and MedImmune, Inc., a Delaware Corporation, having offices at 35

West Watkins Mill Road, Gaithersburg, MD 20878 ("MEDIMMUNE").

     WHEREAS, MEDIMMUNE desires that IXSYS perform certain

research and development to modify a certain antibody; and

     WHEREAS, IXSYS desires to perform such work on the terms and

conditions of this Agreement.

     NOW THEREFORE in consideration of the mutual promises and

other good and valuable consideration, the parties agree as

follows:



     SECTION 1 - Definitions.

     The terms used in this Agreement have the following meaning:

     1.1  "AFFILIATE," as applied to a person or entity, means

any other person or entity controlling or controlled by or under

common control with such person or entity.  The term "control"

means possession of the power to direct or cause the direction of

the management and policies whether through the ownership of

voting securities, by contract or otherwise.  The ownership of

voting securities of a person, organization or entity, however,

shall not, in and of itself, constitute "control" for purposes of

this definition, unless said ownership is of a majority of the

outstanding securities entitled to vote of such person,

organization or entity.  Affiliate shall also mean a limited

partnership in which a subsidiary of such person, organization or

entity is a general partner.

     1.2  "ANTIBODY" means an antibody that specifically binds to

(CONFIDENTIAL TREATMENT REQUESTED) (including, but not limited

to, variants, chimeric antibodies, humanized antibodies,

recombinant antibodies, grafted antibodies, single chain

antibodies, and the like) developed by IXSYS during the term of

the PROGRAM or a fragment of such an antibody.

     1.3  "ASSIGNED MATERIALS AND INFORMATION" means all

ANTIBODIES, cell lines used by IXSYS for producing ANTIBODIES,

polynucleotides encoding ANTIBODIES, assays, vectors and

constructs for producing ANTIBODIES, sequence information

regarding such ANTIBODIES and polynucleotides, and the results of

the testing and evaluation of such ANTIBODIES and information and

data useful for the manufacture, making and use of ANTIBODY, in

each case which is developed by IXSYS during the term of the

PROGRAM, and only in the case of assays, vectors and constructs,

only to the extent IXSYS or its AFFILIATES has the right during

the term of the PROGRAM to assign such to MEDIMMUNE.

     1.4  "ASSIGNED PATENT(S)" means any patent or patent

application (or equivalents thereof, such as extensions or other

rights that give the right to exclude others such as

Supplementary Protection Certificates) anywhere in the world to

the extent a claim thereof would be infringed by the manufacture,

use, or sale of a product comprising an ANTIBODY and that is

based on ANTIBODY and/or ASSIGNED MATERIALS AND INFORMATION.

     1.5  "DESIGNATED AMOUNT" means the total worldwide sales of

products comprising the EXISTING ANTIBODY sold by or on behalf of

MEDIMMUNE for the twelve-month period prior to the time a PRODUCT

receives all licensing and pricing approvals for sale of PRODUCT

in a country.

     1.6  (CONFIDENTIAL TREATMENT REQUESTED) means (CONFIDENTIAL

TREATMENT REQUESTED).

     1.7  "EXISTING IXSYS PATENT(S)" means any patent or patent

application (or equivalents thereof, such as extensions or other

rights that give the right to exclude others such as

Supplementary Protection Certificates) anywhere in the world to

the extent the claims of which would be infringed by the

manufacture, use or sale of a product comprising an ANTIBODY, and

only to the extent that it is either owned by or licensed to

IXSYS (with the right to grant sublicenses) or as to which IXSYS

otherwise has licensable rights, in each case, as of the

EFFECTIVE DATE.

     1.8  "FIRST COMMERCIAL SALE" means, in each country, (a) the

first sale of a PRODUCT by MEDIMMUNE, its AFFILIATE or

SUBLICENSEE following approval of its marketing by the

appropriate governmental agency for the country in which the sale

is to be made, or (b) when governmental approval is not required,

the first commercial sale of a PRODUCT by MEDIMMUNE, its

AFFILIATE or SUBLICENSEE in that country.

     1.9  "FTE"  means one full time equivalent scientific

investigator, together with all reasonably necessary materials,

equipment and facilities used thereby.

     1.10 "MATERIALS" means ANTIBODIES, cell lines used or

developed by IXSYS for producing ANTIBODIES, polynucleotides

encoding ANTIBODIES, and the assays, vectors and constructs for

producing ANTIBODIES, in each case only to the extent owned by or

licensed to IXSYS (with the right to grant sublicenses) or as to

which IXSYS otherwise has transferable rights, and in the

possession and control of IXSYS, in each case, that exists as of

the EFFECTIVE DATE.

     1.11 "NET SALES" means, with respect to any PRODUCT, the

invoiced sales price of such PRODUCT sold by MEDIMMUNE, its

AFFILIATES and SUBLICENSEES to independent customers who are not

AFFILIATES, less (a) actual and customary credits, allowances,

discounts and rebates to, and chargebacks from the account of,

such independent customers for spoiled, damaged, out-dated,

rejected or returned PRODUCT; (b) actual freight and insurance

costs incurred in transporting such PRODUCT to such customers;

(c) actual and customary cash, quantity and trade discounts;

(d) sales, use, value-added and taxes or governmental charges

(excluding what is commonly known as income taxes) incurred in

connection with the exportation or importation of such PRODUCT;

(e) the cost to MEDIMMUNE of the devices for dispensing or

administering such PRODUCT as well as diluents or similar

materials which accompany such PRODUCT as it is sold and (f)

reasonable allowance for bad debt, all of the above in accordance

with Generally Accepted Accounting Principles.  For purposes of

determining NET SALES, a sale shall have occurred when an invoice

therefor shall be generated or the PRODUCT shipped for delivery.

Sales of PRODUCTS by MEDIMMUNE, an AFFILIATE or SUBLICENSEE to

any AFFILIATE or SUBLICENSEE which is a reseller thereof shall be

excluded, and only the subsequent sale of such PRODUCTS by

AFFILIATES or SUBLICENSEES to unrelated parties  shall be deemed

NET SALES hereunder.

     1.12 "PRODUCT" means  a product comprising (i) an ANTIBODY,

the manufacture, use or sale of which infringes a VALID PATENT

CLAIM under the ASSIGNED PATENTS or under the EXISTING IXSYS

PATENTS as to which MEDIMMUNE retains a license under this

Agreement, (ii) an ANTIBODY assigned to MEDIMMUNE by IXSYS under

this Agreement, or (iii) an ANTIBODY which is derived from an

ANTIBODY assigned to MEDIMMUNE under this Agreement.

     1.13 "PROGRAM" means the research and development program

described generally in Section 2.1.

     1.14 "ROYALTY PERIOD" means, with respect to each PRODUCT in

each country in the LICENSED TERRITORY, (a) if the manufacture,

use, offer for sale, sale or import of such PRODUCT in such

country at the time of the FIRST COMMERCIAL SALE infringes a

VALID PATENT CLAIM (if in an issued patent) but for the license

granted by this Agreement, the royalty period continues for as

long as such VALID PATENT CLAIM remains in effect and (if in an

issued patent) is infringed thereby but for the license granted

by this Agreement, or (b) otherwise, (CONFIDENTIAL TREATMENT

REQUESTED) years from the date of the FIRST COMMERCIAL SALE of

such PRODUCT in such country.

     1.15 (CONFIDENTIAL TREATMENT REQUESTED)

     1.16 "SUBLICENSEE" means any AFFILIATE or THIRD PARTY that

is granted a sublicense by MEDIMMUNE under this Agreement.

     1.17 "THIRD PARTY(IES)" means a person or entity other than

IXSYS or MEDIMMUNE or any of their AFFILIATES.

     1.18 The term "VALID PATENT CLAIM" shall mean either (a) a

claim of an issued and unexpired patent included within the

ASSIGNED PATENTS or the EXISTING IXSYS PATENTS, which has not

been held permanently revoked, unenforceable or invalid by a

decision of a court or other governmental agency of competent

jurisdiction, unappealable or unappealed within the time allowed

for appeal, and which has not been admitted to be invalid or

unenforceable through reissue or disclaimer or otherwise or (b) a

claim of a pending patent application included within the

ASSIGNED PATENTS or the EXISTING IXSYS PATENTS, which claim was

filed in good faith and has not been abandoned or finally dis

allowed without the possibility of appeal or refiling of such

application, the subject matter of which has not been pending for

more than five (5) years, including the pendency of any prior

application.

     1.19 The use herein of the plural shall include the

singular, and the use of the masculine shall include the

feminine.

     1.20 All dollars are United States Dollars.



     SECTION 2 - The PROGRAM

     2.1  (a)  IXSYS shall perform a program of research and

development in accordance with this Section 2 to produce modified

antibodies to the (CONFIDENTIAL TREATMENT REQUESTED), and shall

use its commercially reasonable efforts to produce a modified

antibody of the (CONFIDENTIAL TREATMENT REQUESTED) that

(CONFIDENTIAL TREATMENT REQUESTED) as compared to (CONFIDENTIAL

TREATMENT REQUESTED), as measured in the (CONFIDENTIAL TREATMENT

REQUESTED) model.

          (b)  The parties shall prepare a mutually acceptable

written workplan for the PROGRAM.  Any such workplan shall be

modified and supplemented from time to time only by the mutual

written agreement of the parties.

          (c)  The research and development work to be performed

by IXSYS under the PROGRAM shall not be performed by a THIRD

PARTY without the written approval of MEDIMMUNE.

          (d)  IXSYS shall allocate not less than (CONFIDENTIAL

TREATMENT REQUESTED)  FTEs to conduct the PROGRAM and at the

request of MEDIMMUNE upon sixty (60) days' prior written notice,

IXSYS shall be required to allocate up to (CONFIDENTIAL TREATMENT

REQUESTED) FTEs to conduct the PROGRAM, provided that once the

FTEs are increased, MEDIMMUNE will not have the right to decrease

the number of FTEs.

          (e)  The PROGRAM shall commence on the date thirty (30)

days after the EFFECTIVE DATE and continue for a term of

(CONFIDENTIAL TREATMENT REQUESTED) thereafter provided however at

the request of MEDIMMUNE, and upon sixty (60) days' prior written

notice to IXSYS, the term shall be extended for up to

(CONFIDENTIAL TREATMENT REQUESTED) in (CONFIDENTIAL TREATMENT

REQUESTED) increments.

     2.2  It is understood that MEDIMMUNE intends to measure the

potency of ANTIBODY obtained from IXSYS in the (CONFIDENTIAL

TREATMENT REQUESTED) model to determine the potency thereof with

a view toward developing and commercializing such an ANTIBODY. It

is further understood and agreed that ANTIBODY obtained from

IXSYS that is tested, if any, shall be determined by MEDIMMUNE,

within its sole and absolute discretion, that MEDIMMUNE, within

its sole and absolute discretion, shall determine whether or not

to develop and/or commercialize a PRODUCT and which, if any,

PRODUCT shall be developed and commercialized and in which, if

any, countries it should be developed and commercialized.

     2.3  (a)  MEDIMMUNE shall pay IXSYS at the rate equal to

(CONFIDENTIAL TREATMENT REQUESTED) per FTE required to be

allocated to the PROGRAM as set forth above, payable in equal

quarterly installments of (CONFIDENTIAL TREATMENT REQUESTED) per

FTE per quarter in advance on the EFFECTIVE DATE and each three

(3) month anniversary thereof during the term of the PROGRAM for

the period of Section 2.1(e) which amount covers both direct and

indirect expenses.  If the number of FTEs is increased in any

quarter, the pro-rata amount for such quarter for such increase

shall be paid for the remainder of such quarter (and provided

that such payment shall be due on the effective date of such

increase if the notice and effective date of such increase is in

the same calendar quarter).

          (b)  MEDIMMUNE shall not be required to make any

payments to IXSYS for research that exceeds the aggregate amount

described in Section 2.3(a), and IXSYS shall not be required to

perform research or development under the PROGRAM that exceeds

such aggregate amount, unless agreed to in writing by both

parties.

     2.4  Within ten (10) days after the EFFECTIVE DATE,

MEDIMMUNE shall provide IXSYS with such quantity (as reasonably

sufficient to enable IXSYS to conduct the PROGRAM) of the

(CONFIDENTIAL TREATMENT REQUESTED), polynucleotides encoding the

(CONFIDENTIAL TREATMENT REQUESTED) and (CONFIDENTIAL TREATMENT

REQUESTED), the (CONFIDENTIAL TREATMENT REQUESTED) and together

with any other information and data which the parties mutually

agree is reasonably necessary for IXSYS to conduct the PROGRAM.

Additionally, during the term of the PROGRAM, MEDIMMUNE shall

provide IXSYS, at MEDIMMUNE's sole cost, with such technical

assistance as IXSYS reasonably requests regarding the use of such

assay under the PROGRAM.

     2.5  During the term of the PROGRAM, IXSYS shall permit

representatives of MEDIMMUNE, upon reasonable notice during

normal business hours at MEDIMMUNE's expense, to visit the

facilities where IXSYS is conducting the PROGRAM and during such

visits shall make employees of IXSYS, who are performing research

and development under the PROGRAM, reasonably available to

representatives of MEDIMMUNE to discuss such research and

development and the results thereof.

     2.6  Not later less than once each calendar quarter during

the term of the PROGRAM, and not more than thirty (30) days after

conclusion of the term of the PROGRAM, IXSYS, at the cost and

expense of IXSYS, shall transfer to MEDIMMUNE the ASSIGNED

MATERIALS AND INFORMATION and any other MATERIALS not previously

transferred to MEDIMMUNE hereunder.

     2.7  For a period of six (6) months after the conclusion of

the term of the PROGRAM, IXSYS, at the cost and expense of IXSYS,

shall provide MEDIMMUNE with such technical assistance as

reasonably requested by MEDIMMUNE with respect to the use of the

ASSIGNED MATERIALS AND INFORMATION, and MATERIALS hereunder.

     2.8  Except as permitted by MEDIMMUNE, during the term of

the PROGRAM and for a period of (CONFIDENTIAL TREATMENT

REQUESTED) years thereafter, IXSYS and its AFFILIATES shall not

(1) research, develop, make, have made, use or sell any antibody

or any antibody fragment directed to (CONFIDENTIAL TREATMENT

REQUESTED) or any polynucleotide encoding the foregoing, (2)

perform research or development work for a THIRD PARTY with

respect to any such antibody, fragment or polynucleotide , or (3)

research, develop, make, have made, use or sell or grant rights

to a THIRD PARTY with respect to any such antibody, fragment or

polynucleotide that was conceived or reduced to practice during

the term of the PROGRAM or within a period of (CONFIDENTIAL

TREATMENT REQUESTED) years thereafter.

     2.9  IXSYS shall have the right to publish the results of

IXSYS' work under the PROGRAM; provided, however, that IXSYS

shall provide MEDIMMUNE the opportunity to review any proposed

manuscripts or any other proposed disclosure describing such work

sixty (60) days prior to their submission for publication or

other proposed disclosure.  MEDIMMUNE and IXSYS shall discuss

whether or not such publication or disclosure should occur and it

is expressly understood that MEDIMMUNE shall have the sole right

to make a final determination as to whether or not such

publication or disclosure shall occur provided that such

determination is not unreasonable.  It shall not be unreasonable

to deny publication on the basis that the information proposed to

be published is not generally available to the public and may aid

a competitor in developing a competitive product.



     SECTION 3 - Assignment and License Grants.

     3.1  (a)  IXSYS hereby grants to MEDIMMUNE and MEDIMMUNE

hereby accepts from IXSYS a sole and exclusive worldwide right

and license (or sublicense, as applicable) (1) under and to

EXISTING IXSYS PATENTS to research, develop, make, have made,

use, import, export and sell, offer to sell or have sold PRODUCTS

and (2) to make, have made and to use MATERIALS for all the

purposes of Section 3.1(a)(1).  Notwithstanding anything to the

contrary in this Agreement, the rights and licenses granted to

MEDIMMUNE under this Agreement exclude any right or license

(express or implied) under any IXSYS patent rights or know-how

regarding the generation, discovery or modification of antibody

libraries, antibodies or fragments thereof, generally.

          (b)  To the extent that the rights and licenses granted

to MEDIMMUNE under Section 3.1(a) is a sublicense under a license

agreement between IXSYS and a THIRD PARTY, the rights and

licenses granted to MEDIMMUNE under such sublicense are limited

to the extent that IXSYS has the right to grant sublicenses under

such license agreement and such sublicense is subject to the

terms, conditions and restrictions of such license agreement that

are applicable to a sublicensee thereunder.  MEDIMMUNE shall not

take or omit to take any action the effect of which would cause

IXSYS to be in breach of  IXSYS' obligations under such license

agreements (without regard to any applicable cure or notice

requirements thereof).

     3.2  MEDIMMUNE shall have the right to grant sublicenses

under the licenses and sublicenses granted under Section 3.1

(with the right to grant further sublicenses, subject to any

terms, conditions and restrictions on further sublicensing under

any license agreement under which MEDIMMUNE is a sublicensee) to

its AFFILIATES and THIRD PARTIES.  Each such sublicense shall be

subject to the terms and conditions of this Agreement.

     3.3  The licenses granted hereunder include the right of

MEDIMMUNE, its AFFILIATES and SUBLICENSEES to grant to the

purchaser thereof the right to use and/or resell a purchased

PRODUCT for which a royalty has been paid hereunder on NET SALES

of such PRODUCT (determined in accordance with Section 1.11),

without payment of any further royalty to IXSYS.

     3.4  (a)  IXSYS agrees to assign and hereby assigns to

MEDIMMUNE all right, title and interest in and to the ASSIGNED

MATERIALS AND INFORMATION together with all ASSIGNED PATENTS and

other intellectual property rights arising therefrom.

          (b)  IXSYS agrees to cooperate with MEDIMMUNE and cause

its employees to cooperate with MEDIMMUNE and to perform all

acts, at MEDIMMUNE's request on reasonable notice and during

normal business hours, as reasonably necessary (i) to perfect

MEDIMMUNE's ownership interest in and to the ASSIGNED MATERIALS

AND INFORMATION together with all ASSIGNED PATENTS and other

intellectual property rights arising therefrom, and (ii) to

facilitate the preparation, filing, prosecution and enforcement

of the ASSIGNED PATENTS.  MEDIMMUNE shall reimburse IXSYS on

demand for the reasonable cost to IXSYS (at the rate set forth in

Section 2.3(a) plus all out-of-pocket expenses) incurred in

connection therewith.

          (c)  IXSYS hereby reserves the nonexclusive,

nontransferable right to use  information and data that are

included in ASSIGNED MATERIALS AND INFORMATION for its own

internal research use; provided, however, that IXSYS shall not

use the ASSIGNED MATERIALS AND INFORMATION to make, have made,

use or sell any antibody directed to (CONFIDENTIAL TREATMENT

REQUESTED), or perform research or development work for a THIRD

PARTY with respect to any such antibody.



     SECTION 4 - Confidentiality.

     4.1  During the term of this Agreement, IXSYS agrees not to

provide or disclose to a THIRD PARTY any MATERIALS without the

written permission of MEDIMMUNE.

     4.2  After the date of this Agreement, subject to Section

2.9, IXSYS agrees not to provide or disclose to a THIRD PARTY any

ASSIGNED MATERIALS AND INFORMATION without the written permission

of MEDIMMUNE.

     4.3  During the term of this Agreement, it is contemplated

that each party will disclose to the other party confidential

information which is owned or controlled by the party providing

such information or which that party is obligated to maintain in

confidence and which is designated by the party providing such

information as confidential ("Confidential Information").  Each

party shall have the right to refuse to accept the other party's

Confidential Information.  Each party agrees to retain the other

party's Confidential Information in confidence, to limit

disclosure of any such Confidential Information to its officers,

directors, employees, consultants, sublicensees and permitted

assigns on a need to know basis, to use the other party's

Confidential Information only for the purposes of this Agreement,

and not to disclose any such Confidential Information to any

other person or entity without the prior written consent of the

party providing such Confidential Information.  For the avoidance

of doubt ASSIGNED MATERIALS AND INFORMATION are Confidential

Information of MEDIMMUNE.

     4.4  The obligations of confidentiality and non-use of

Sections 4.1, 4.2 and 4.3 will not apply to:

                    (i)  Confidential Information generally known

               to the public prior to its disclosure hereunder;

               or

                    (ii) Confidential Information that

               subsequently becomes known to the public by some

               means other than a breach of this Agreement;

                    (iii)     Confidential Information that is

               subsequently disclosed to the receiving party by a

               third party having a lawful right to make such

               disclosure; or

                    (iv) is approved for release by the parties.

     4.5  Neither party shall disclose any terms or conditions of

this Agreement to any third party without the prior consent of

the other party; provided, however, that a party may disclose the

terms or conditions of this Agreement, (a) on a need-to-know

basis to its legal and financial advisors to the extent such

disclosure is reasonably necessary in connection with such

party's activities expressly permitted by this Agreement and

ordinary and customary business operations, and (b) to a third

party in connection with (i) an equity investment in such party,

(ii) a merger, consolidation, change in control or similar

transaction by such party, or (iii) the transfer or sale of all

or substantially all of the assets of such party.

Notwithstanding the foregoing, prior to execution of this

Agreement the parties have agreed upon the substance of

information that may be used to describe the terms and conditions

of this transaction, and each party may disclose such

information, as modified by mutual written agreement of the

parties, without the consent of the other party.

     4.6  The obligations of this Section 4 shall not apply to

the extent that a party is required to disclose information by

applicable law, regulation or bona fide legal process, provided

that the party required to make the disclosure takes reasonable

steps to restrict and maintain confidentiality of such disclosure

and provides reasonable prior notice to the other party.

     4.7  Notwithstanding the foregoing, MEDIMMUNE shall have the

right to disclose Confidential Information of IXSYS to a THIRD

PARTY with whom MEDIMMUNE has or proposes to enter into a

business relationship and who undertakes an obligation of

confidentiality and non-use with respect to such information, at

least as restrictive as the obligation under this Section 4.

     4.8  The parties' obligations under this Section 4 shall

terminate five (5) years after the expiration or termination of

this Agreement.



     SECTION 5 - Royalties.

     5.1  During the ROYALTY PERIOD, MEDIMMUNE shall pay

royalties to IXSYS for PRODUCTS as follows:

          (a)  (CONFIDENTIAL TREATMENT REQUESTED) of that portion

of NET SALES of PRODUCTS in a calendar year up to the DESIGNATED

AMOUNT;

          (b)  (CONFIDENTIAL TREATMENT REQUESTED) of that portion

of NET SALES of PRODUCTS in a calendar year above the DESIGNATED

AMOUNT.

          The cumulative NET SALES for a calendar year shall be

calculated based on worldwide NET SALES.

     5.2  In the event that a PRODUCT is sold in combination with

a therapeutically active component that is not a PRODUCT (such

combination being a "Combination Product"), then NET SALES of

such Combination Product upon which a royalty is paid shall be

subject to the following adjustment.  If the PRODUCT and the

other therapeutically active component are sold separately in a

country, then NET SALES of such Combination Product in such

country upon which a royalty is paid shall be multiplied by the

fraction A/A+B, where A equals the average sales price of such

PRODUCT sold separately in such country, and B equals the average

sales price of the other therapeutically active component sold

separately in such country.  Otherwise, the parties shall enter

into good faith negotiations and attempt to reach mutual

agreement to determine an appropriate adjustment to the NET SALES

of such Combination Product in a country to reflect the relative

contributions of the PRODUCT and the other therapeutically active

component to the value of the Combination Product in such

country.  If such mutual agreement is not reached within ninety

(90) days after commencement of such negotiations, then the NET

SALES of such Combination Product in such country shall be

determined by binding arbitration under Section 11.2.

     5.3  MEDIMMUNE shall keep, and shall cause each of its

AFFILIATES and SUBLICENSEES to keep, full and accurate books of

account containing all particulars that may be necessary for the

purpose of calculating all royalties payable to IXSYS.  Such

books of account, with all necessary supporting data, shall be

kept at their principal place of business, and for the three (3)

years next following the end of the calendar year to which each

pertains, shall be open for inspection by an independent

certified accountant selected by IXSYS and reasonably acceptable

to MEDIMMUNE upon reasonable notice during normal business hours

at IXSYS' expense for the sole purpose of verifying royalty

statements or compliance with this Agreement, but in no event

more than once in each calendar year.  All information and data

offered shall be used only for the purpose of verifying royalties

and shall be treated as MEDIMMUNE Confidential Information

subject to the obligations of this Agreement.

     5.4  With each quarterly payment, MEDIMMUNE shall deliver to

IXSYS a full and accurate accounting of the calculation of the

royalties owing hereunder to include at least the following

information:

          (a)  Quantity of each PRODUCT subject to royalty sold

(by country) by MEDIMMUNE, its AFFILIATES and SUBLICENSEES;

          (b)  NET SALES for each PRODUCT (by country);

          (c)  The calculation of the gross royalties (before

deductions) for each PRODUCT (by country) and any deductions,

offsets and credits therefrom; and

          (d)  Total royalties payable to IXSYS for each PRODUCT

(by country) and the total royalties payable to IXSYS for all

PRODUCTS (for all countries).

     5.5  In each year the amount of royalty due shall be

calculated quarterly as of March 31, June 30, September 30 and

December 31 (each being the last day of an "ACCOUNTING PERIOD")

and shall be paid quarterly within the sixty (60) days next

following such date.  Every such payment shall be supported by

the accounting prescribed in Section 5.4 and shall be made in

United States currency.  Whenever for the purpose of calculating

royalties conversion from any foreign currency shall be required,

such conversion shall be at the average of the rate of exchange

(local currency per US$1) published in the Western Edition of The

Wall Street Journal under the caption "Currency Trading" for the

last business day of each month during the applicable ACCOUNTING

PERIOD.

     5.6  If the transfer of or the conversion into United States

Dollar equivalent of any remittance due hereunder is not lawful

or possible in any country, such remittance shall be made by the

deposit thereof in the currency of the country to the credit and

account of IXSYS or its nominee in any commercial bank or trust

company located in that country, prompt notice of which shall be

given to IXSYS.  IXSYS shall be advised in writing in advance by

MEDIMMUNE and provide to MEDIMMUNE a nominee, if so desired.

     5.7  Any tax required to be withheld by MEDIMMUNE under the

laws of any foreign country for the account of IXSYS shall be

promptly paid by MEDIMMUNE for and on behalf of IXSYS to the

appropriate governmental authority, and MEDIMMUNE shall furnish

IXSYS with proof of payment of such tax.  Any such tax actually

paid on IXSYS' behalf shall be deducted from royalty payments due

IXSYS.

     5.8  Only one royalty shall be due and payable under each of

the applicable subsections under this Section 5 for the

manufacture, use and sale of a PRODUCT irrespective of the number

of patents or claims thereof which cover the manufacture, use and

sale of such PRODUCT.

     5.9  (a)  MEDIMMUNE shall pay to IXSYS the following

milestone payments upon the occurrence of the following events

with respect to a PRODUCT:

     Event                                                  Payment

      (i) Demonstration in the (CONFIDENTIAL TREATMENT
     REQUESTED) model that a PRODUCT has a (CONFIDENTIAL
     TREATMENT REQUESTED) as compared to (CONFIDENTIAL
     TREATMENT REQUESTED)                                   $  (CTR)

      (ii) Demonstration in the (CONFIDENTIAL TREATMENT
      REQUESTED) model that a PRODUCT has a (CONFIDENTIAL
      TREATMENT REQUESTED) as compared to (CONFIDENTIAL
      TREATMENT REQUESTED)                                  $  (CTR)

      (iii) Filing an IND (or its foreign equivalent)
      for a PRODUCT                                         $  (CTR)

      (iv) Obtains approval of a Biologics License
       Application (or its foreign equivalent) for a
       PRODUCT                                              $  (CTR)

          (b)  The milestone payments under Section 5.9(a) are

due and payable sixty (60) days after the applicable milestone

occurs.

          (c)  (CONFIDENTIAL TREATMENT REQUESTED) of all

milestone payments paid under Section 5.9(a) are creditable

against up to (CONFIDENTIAL TREATMENT REQUESTED) of each  royalty

payment that is to be made pursuant to Section 5.1 until the full

amount of such credit has been taken..

          (d)  The total payment under Section 5.9(a)(i) and

5.9(a)(ii) shall not exceed (CONFIDENTIAL TREATMENT REQUESTED),

and the total milestone payments for any and all PRODUCT shall

not exceed  (CONFIDENTIAL TREATMENT REQUESTED).



     SECTION 6 - Warranties.

     6.1  Each of IXSYS and MEDIMMUNE warrants and represents to

the other that:

          (a) it has the corporate power and authority and the

legal right to enter into this Agreement and to perform its

obligations hereunder;

          (b) it has taken all necessary corporate action on its

part to authorize the execution and delivery of this Agreement

and the performance of its obligations hereunder; and

          (c) this Agreement has been duly executed and delivered

on its behalf, and constitutes a legal, valid, binding

obligation, enforceable against it in accordance with its terms.

    6.2   IXSYS represents and warrants to MEDIMMUNE that:

          (a)  it has not previously granted and, prior to

expiration or termination of this Agreement, will not grant any

rights in the EXISTING IXSYS PATENTS, ASSIGNED PATENTS,

MATERIALS, and ASSIGNED MATERIALS AND INFORMATION that conflict

with the rights and licenses granted to MEDIMMUNE herein;

          (b)  all persons performing research by or on behalf of

IXSYS under the PROGRAM will be obligated to assign to IXSYS (for

re-assignment to MEDIMMUNE hereunder), the ownership of ASSIGNED

MATERIALS AND INFORMATION, the ASSIGNED PATENTS and all other

intellectual property rights arising therefrom.

    6.3   Disclaimer.  EXCEPT AS OTHERWISE EXPRESSLY SET FORTH IN

SECTIONS 6.1 and 6.2, NEITHER PARTY MAKES ANY REPRESENTATION OR

EXTENDS ANY WARRANTIES OF ANY KIND EITHER EXPRESS OR IMPLIED,

INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR VALIDITY OF

ANY PATENT RIGHTS ISSUED OR PENDING.



    SECTION 7 - Indemnification.

    7.1  MEDIMMUNE agrees to indemnify and hold harmless IXSYS,

its directors, officers, employees and agents (collectively, the

"Indemnitees") from and against all losses, liabilities, damages

and expenses (including reasonable attorneys' fees and costs)

incurred in connection with any claims, demands, actions or other

proceedings by any third party arising from (a) the research,

development, manufacture, use or sale of ANTIBODIES or PRODUCTS

by MEDIMMUNE, its AFFILIATES or SUBLICENSEES, (b) the use of

PRODUCTS by any purchasers thereof, (c) the use by MEDIMMUNE, its

AFFILIATES or SUBLICENSEES of the EXISTING IXSYS PATENTS, the

ASSIGNED MATERIALS AND INFORMATION or the ASSIGNED PATENTS,

(d) any act or omission by MEDIMMUNE, its AFFILIATES OR

SUBLICENSEES the effect of which would cause IXSYS to be in

breach of its obligations under the license agreements described

in Section 3.1(b) (without regard to any applicable cure or

notice requirements thereof, or (e) patent infringement by IXSYS

during the PROGRAM based on a claim that an ANTIBODY or ligand or

assay provided by MEDIMMUNE to IXSYS infringes a patent of a

THIRD PARTY.

    7.2  If any such claims or actions are made, IXSYS shall be

defended at MEDIMMUNE's sole expense by counsel selected by

MEDIMMUNE and reasonably acceptable to IXSYS provided that IXSYS

may, at its own expense, also be represented by counsel of its

own choosing.

    7.3  MEDIMMUNE's indemnification under Section 7.1 shall not

apply to the extent any loss, liability, damage or expense is

attributable to the gross negligence or intentional misconduct of

the Indemnitees.

    7.4  MEDIMMUNE may not settle any such claim, demand, action

or other proceeding or otherwise consent to an adverse judgment

in any such action or other proceeding that diminishes the rights

or interests of the Indemnitees without the express written

consent of the Indemnitees.

    7.5  IXSYS shall notify MEDIMMUNE promptly of any claim,

demand, action or other proceeding under Section 7.1 and shall

reasonably cooperate with all reasonable requests of MEDIMMUNE

with respect thereto.



    SECTION 8 -  Assignment; Successors.

    8.1  This Agreement shall not be assigned or otherwise

transferred (in whole or in part, whether voluntarily, by

operation of law or otherwise) by either of the parties without

the prior written consent of the other party (which consent shall

not be unreasonably withheld); provided, however, that either

party may, without such consent, assign this Agreement and its

rights and obligations hereunder to an AFFILIATE or in connection

with the transfer or sale of all or substantially all of its

business, or in the event of its merger, consolidation, change in

control or similar transaction, provided that such assignment by

IXSYS does not cause the termination of the rights and licenses

granted to MEDIMMUNE under this Agreement.  Any permitted

assignee shall assume all obligations of its assignor under this

Agreement.  Any purported assignment or transfer in violation of

this Section 8.1 shall be void.

    8.2  Subject to the limitations on assignment herein, this

Agreement shall be binding upon and inure to the benefit of said

successors in interest and assigns of MEDIMMUNE and IXSYS.



    SECTION 9 - Term and Termination.

    9.1  Except as otherwise specifically provided herein and

unless sooner terminated pursuant to Section 9.2 or 9.3 of this

Agreement, this Agreement and the licenses and rights granted

thereunder shall remain in full force and effect until MEDIMMUNE

has no further royalty obligation hereunder at which time

MEDIMMUNE shall have a fully paid up, non-cancelable,

nonexclusive license to make, have made and use MATERIALS  to

research, develop, make, have made, use, import, export, sell,

offer to sell, or have sold PRODUCTS.

    9.2  MEDIMMUNE shall have the right to terminate this

Agreement upon ninety (90) days prior written notice to IXSYS.

    9.3  IXSYS shall have the right to terminate this Agreement

if and only if MEDIMMUNE breaches its obligations under Section

5 or 7.  If such a breach shall occur, IXSYS shall provide

MEDIMMUNE with written notice of such breach and if such breach

is not cured within thirty (30) days after such written notice,

IXSYS may terminate this Agreement by written notice to

MEDIMMUNE, provided such written notice is given within thirty

(30) days after the expiration of such initial thirty (30) day

period.

    9.4  Upon any termination of this Agreement, MEDIMMUNE, at

its option, shall be entitled to sell any completed inventory of

PRODUCT which remains on hand as of the date of the termination,

so long as MEDIMMUNE pays to IXSYS the royalties applicable to

said subsequent sales in accordance with the same terms and

conditions as set forth in this Agreement.

    9.5  In the event that this Agreement is terminated under

Section 9.2 or 9.3, any sublicense granted under this Agreement

shall remain in full force and effect as a direct license between

IXSYS and the SUBLICENSEE under the terms and conditions of the

sublicense agreement, subject to the SUBLICENSEE agreeing to be

bound to IXSYS under such terms and conditions within thirty (30)

days after IXSYS provides written notice to the SUBLICENSEE of

the termination of this Agreement.  At the request of MEDIMMUNE,

IXSYS will acknowledge to a SUBLICENSEE IXSYS' obligations to the

SUBLICENSEE under this paragraph.

    9.6  The provisions of Sections 2.8, 2.9, 3.4(c), 4, 7, 9.4,

9.5 and 9.6 shall survive any expiration or termination of this Agreement.

    9.7  Upon expiration or termination of this Agreement for any

reason, nothing herein shall be construed to release either party

from any obligation that matured prior to the effective date of

such expiration or termination.

    9.8  All rights and licensing granted under or pursuant to

this Agreement by IXSYS to MEDIMMUNE are, and shall irrevocably

be deemed to be, "intellectual property" as defined in Section

101(56) of the Bankruptcy Code.  In the event of the commencement

of a case by or against either party under any Chapter of the

Bankruptcy Code, this Agreement shall be deemed an executory

contract and all rights and obligations hereunder shall be

determined in accordance with Section 365(n) thereof.  Unless a

party rejects this Agreement and the other party decides not to

retain its rights hereunder, the other party shall be entitled to

a complete duplicate of (or complete access to, as appropriate)

all intellectual property and all embodiments of such

intellectual property held by the party and the party shall not

interfere with the rights of the other party, which are expressly

granted hereunder, to such intellectual property and all

embodiments of such intellectual property from another entity.

Further, this Agreement shall be deemed, upon presentation to

another entity, to be the same as an express instruction by the

party to such other entity to provide such intellectual property

and all embodiments of such intellectual property directly to the

other party.  Without limiting the foregoing provisions in this

paragraph, the other party shall be entitled to all post-

bankruptcy-petition improvements, updates, or developments of

intellectual property created hereunder.  If such intellectual

property is not fully developed as of the commencement of any

bankruptcy case, the other party shall have the right to complete

development of the property.

    SECTION 10 - Force Majeure.

    10.1 No failure or omission by the parties hereto in the

performance of any obligation of this Agreement (other than an

obligation for the payment of money) shall be a breach of this

Agreement, nor shall it create any liability, if the same shall

arise from any cause or causes beyond the reasonable control of

the affected party, including, but not limited to, the following,

which for purposes of this Agreement shall be regarded as beyond

the control of the party in question: acts of God; acts or

omissions of any government; any rules, regulations, or orders

issued by any governmental authority or by any officer,

department, agency or instrumentality thereof; fire; storm;

flood; earthquake; accident; war; rebellion; insurrection; riot;

invasion; strikes; and lockouts or the like; provided that the

party so affected shall use its commercially reasonable efforts

to avoid or remove such causes or nonperformance and shall

continue performance hereunder with the utmost dispatch whenever

such causes are removed.



    SECTION 11 - General Provisions.

    11.1 The relationship between IXSYS and MEDIMMUNE is that of

independent contractors.  IXSYS and MEDIMMUNE are not joint

venturers, partners, principal and agent, master and servant,

employer or employee, and have no relationship other than as

independent  contracting parties.  IXSYS shall have no power to

bind or obligate MEDIMMUNE in any manner.  Likewise, MEDIMMUNE

shall have no power to bind or obligate IXSYS in any manner.

    11.2 Any matter or disagreement under Section 5.2, which this

Agreement specifies is to be resolved by arbitration shall be

submitted to a mutually selected single arbitrator to so decide

any such matter or disagreement.  The arbitrator shall conduct

the arbitration in accordance with the Rules of the American

Arbitration Association, unless the parties agree otherwise.  If

the parties are unable to mutually select an arbitrator, the

arbitrator shall be selected in accordance with the procedures of

the American Arbitration Association.  The decision and award

rendered by the arbitrator shall be final and binding.  Judgment

upon the award may be entered in any court having jurisdiction

thereof.  Any arbitration pursuant to this section shall be held

in San Diego, California or such other place as may be mutually

agreed upon in writing by the parties.  The prevailing party in

any such arbitration shall be entitled to recover from the other

party all reasonable attorneys' fees and costs incurred by the

prevailing party in connection therewith.

    11.3 This Agreement sets forth the entire agreement and

understanding between the parties as to the subject matter

thereof and supersedes all prior agreements in this respect.

There shall be no amendments or modifications to this Agreement,

except by a written document which is signed by both parties.

    11.4 This Agreement shall be construed and enforced in

accordance with the laws of the State of California without

regard to the conflicts of law principles thereof.

    11.5 The headings in this Agreement have been inserted for

the convenience of reference only and are not intended to limit

or expand on the meaning of the language contained in the

particular article or section.

    11.6 Any delay in enforcing a party's rights under this

Agreement or any waiver as to a particular default or other

matter shall not constitute a waiver of a party's right to the

future enforcement of its rights under this Agreement, excepting

only as to an expressed written and signed waiver as to a

particular matter for a particular period of time.

    11.7 Any notices given pursuant to this Agreement shall be in

writing, delivered by any means, addressed to the other party at

its address indicated below, or to such other address as the

addressee shall have last furnished in writing to the addressor

and (except as otherwise provided in this Agreement) shall be

effective upon receipt by the addressee.


    IN WITNESS WHEREOF, the parties have executed this Agreement

as of the date set forth above.



     IXSYS, INC.                             MEDIMMUNE, INC.


By: /s/ Janine M. Taylor                By:  /s/ David M. Mott

Name: Janine M. Taylor                  Name: David M. Mott

Title: President & Chief Operating     Title: Vice Chairman &
Officer                                Chief Financial Officer