Exhibit 10.1

    Portions of this document have been redacted pursuant to a Request for
          Confidential Treatment. Redacted portions are indicated with
                              the notation "*****"














                      MASSACHUSETTS INSTITUTE OF TECHNOLOGY

                                       and

                          BIOMARIN PHARMACEUTICAL INC.


                       EXCLUSIVE PATENT LICENSE AGREEMENT



















                                TABLE OF CONTENTS




TABLE OF CONTENTS.............................................................ii
R E C I T A L S................................................................1
1.  Definitions................................................................2
2.  Grant of Rights............................................................5
3.  Company Diligence Obligations..............................................6
4.  Royalties and Payment Terms................................................8
5.  Reports and Records.......................................................10
6.  Patent Prosecution........................................................12
7.  Infringement..............................................................13
8.  Indemnification and Insurance.............................................15
9.  No Representations or Warranties..........................................16
10. Assignment................................................................17
11. General Compliance with Laws..............................................17
12. Termination...............................................................18
13. Dispute Resolution........................................................19
14. Miscellaneous.............................................................21
APPENDIX A....................................................................24
APPENDIX B....................................................................30
APPENDIX C....................................................................31




                                       ii



     Portions of this document have been redacted pursuant to a Request for
          Confidential Treatment. Redacted portions are indicated with
                              the notation "*****"


                      MASSACHUSETTS INSTITUTE OF TECHNOLOGY
                       EXCLUSIVE PATENT LICENSE AGREEMENT


     This Agreement,  effective as of the date set forth above the signatures of
the parties below (the "EFFECTIVE DATE"), is between the Massachusetts Institute
of Technology ("M.I.T."), a Massachusetts  corporation,  with a principal office
at 77 Massachusetts Avenue, Cambridge, MA 02139-4307 and BioMarin Pharmaceutical
Inc. ("BIOMARIN"), a Delaware corporation, with a principal place of business at
371 Bel Marin Keys Blvd., Suite 210, Novato, CA 94949.

                                 R E C I T A L S

     WHEREAS,  M.I.T.  is the owner of certain  PATENT  RIGHTS (as later defined
herein)  relating to heparinases  and to the technology  disclosed  under M.I.T.
Case  No.  4236,  "Neutralization  of the  Anticoagulant  Activities  of the Low
Molecular   Weight   Heparin   Fractions  and  Fragments   With   Flavobacterial
Heparinase," by Howard Bernstein, Charles L. Cooney, Robert S. Langer and Victor
C. Yang;  M.I.T.  Case No.  4330,  "Procedure  for  Purification  of High Purity
Heparinase,"  by Charles L.  Cooney and Joseph J.  Zimmermann;  M.I.T.  Case No.
4370,  "Extracorporeal  Systems for Heparin Neutralizaton Using Porous Fibers or
Tubes," by Ann R. Comfort,  Robert A. Heft and Robert S. Langer; and M.I.T. Case
No. 5546,  "The Heparinase  Gene from  Flavobacterium  Heparinum," by Charles L.
Cooney,  Robert S. Langer,  Kelley W. Moreman and Ram Sasisekharan;  and has the
right to grant licenses under said PATENT RIGHTS;

     WHEREAS,  M.I.T.  and the President and Fellows of Harvard  College are the
owners  of  certain  PATENT  RIGHTS  (as  later  defined  herein)   relating  to
heparinases  and to the technology  disclosed  under M.I.T.  Case No. 4176, "The
Heparinase  Activated  Clotting Time: A New Coagulation Test," by Judah Folkman,
Robert L.  Hannon,  Robert S.  Langer and Robert W.  Thompson,  and  HARVARD has
authorized  M.I.T.  to act as its agent for the purposes of licensing its rights
in this intellectual property in return for a share of royalties.

     WHEREAS,  M.I.T. and the University of Iowa ("U of I") are the joint owners
of certain PATENT RIGHTS (as later defined  herein)  relating to heparinases and
to  the  technology  disclosed  under  M.I.T.  Case  No.  5981,   "Purification,
Composition   and   Characterization   of  Heparinase  II  from   Flavobacterium
Heparinum," by Charles L. Cooney,  Robert S. Langer,  Robert  Lindhardt,  Daniel
Lohse and Ram Sasisekharan; and U of I has authorized M.I.T. to act as its agent
for the purposes of licensing its right in this intellectual  property in return
for a share in royalties.



         WHEREAS, BIOMARIN acquired by assignment in November 2001, the rights
and responsibilities of two License Agreements to the PATENT RIGHTS by and
between M.I.T. and IBEX Technologies Inc. (the "IBEX License Agreements", and
attached herein in Appendix C) and, along with M.I.T., desires to restate and
modify the terms of the IBEX License Agreements in this new Agreement;

     WHEREAS,  M.I.T.  desires to have the  BIOMARIN  continue  to  develop  and
commercialize  the PATENT RIGHTS to benefit the public and is willing to grant a
license to the BIOMARIN thereunder;

     WHEREAS,  to induce  M.I.T.  to enter  into this  Agreement,  BIOMARIN  has
represented  to M.I.T.  that it shall commit itself to a thorough,  vigorous and
diligent program to commercialize  the PATENT RIGHTS so that public  utilization
shall result therefrom; and

     WHEREAS,  BIOMARIN desires to obtain a license under the PATENT RIGHTS upon
the terms and conditions hereinafter set forth.

     NOW, THEREFORE,  M.I.T. and BIOMARIN, in consideration of the premises, the
mutual  promises and  covenants  contained  herein,  and other good and valuable
consideration, hereby agree as follows:

                                 1. Definitions.

     1.1  "AFFILIATE"  shall  mean any  legal  entity  (such  as a  corporation,
partnership,  or limited liability company) that is controlled by BIOMARIN.  For
the  purposes  of this  definition,  the term  "control"  means  (i)  beneficial
ownership  of at  least  fifty  percent  (50%)  of the  voting  securities  of a
corporation  or other  business  organization  with voting  securities or (ii) a
fifty  percent  (50%) or  greater  interest  in the net  assets or  profits of a
partnership or other business organization without voting securities.

                                       2


     1.2  "DIAGNOSTIC   FIELD"  shall  mean  clinical   diagnostics   using  the
HEPARINASES for in vitro testing of external tissue samples from patients.

     1.3  "EXCLUSIVE  PERIOD" shall mean the period of time set forth in Section
2.2.

     1.4 "FIELDS" shall mean the DIAGNOSTIC  FIELD,  RESEARCH REAGENT FIELD, and
THERAPEUTIC FIELD, but shall specifically  exclude any use of the HEPARINASES in
sequencing machines.

         1.5 "HEPARINASES" shall mean the heparinase I, II, and III enzymes
covered under the PATENT RIGHTS.


     1.6  "LICENSED  PRODUCT"  shall  mean any  product  or part  thereof  that:
            (i) absent the license granted hereunder, would infringe one or more
claims of the PATENT RIGHTS;  or
            (ii) is   manufactured   by using a  LICENSED PROCESS  or that, when
used, practices a LICENSED PROCESS.

     1.7  "LICENSED  PROCESS"  shall mean any process  that,  absent the license
granted  hereunder,  would  infringe one or more claims of the PATENT  RIGHTS or
which uses a LICENSED PRODUCT.

     1.8 "NET SALES"  shall mean the gross  amount  billed by  BIOMARIN  and its
AFFILIATES and SUBLICENSEES for LICENSED PRODUCTS and LICENSED  PROCESSES,  less
the following:
            (i) customary  trade,  quantity, or  cash  discounts  to the  extent
actually allowed and taken;
            (ii) amounts repaid or credited by  reason of  rejection  or return;
            (iii) to the extent separately  stated on purchase orders, invoices,
or other  documents of sale, any taxes or other  governmental  charges levied on
the production, sale, transportation,  delivery, or use of a LICENSED PRODUCT or
LICENSED PROCESS which is paid by or on behalf of BIOMARIN; and
            (iv) outbound  transportation costs prepaid  or allowed and costs of
insurance in transit.

                                       3


     No deductions  shall be made for  commissions  paid to individuals  whether
they are with independent  sales agencies or regularly  employed by BIOMARIN and
on its payroll, or for cost of collections. NET SALES shall occur on the date of
billing for a LICENSED PRODUCT or LICENSED  PROCESS.  If a LICENSED PRODUCT or a
LICENSED  PROCESS is  distributed  at a discounted  price that is  substantially
lower than the customary price charged by BIOMARIN,  or distributed for non-cash
consideration  (whether or not at a  discount),  NET SALES  shall be  calculated
based on the  non-discounted  amount of the LICENSED PRODUCT or LICENSED PROCESS
charged to an independent  third party during the same  REPORTING  PERIOD or, in
the absence of such sales,  on the fair market value of the LICENSED  PRODUCT or
LICENSED PROCESS
     Non-monetary   consideration  shall  not  be  accepted  by  BIOMARIN,   any
AFFILIATE,  or any SUBLICENSEE for any LICENSED  PRODUCTS or LICENSED  PROCESSES
without the prior written consent of M.I.T.

     1.10 "PATENT RIGHTS" shall mean:

            (a)      the  United  States  and i nternational  patents  listed on
Appendix A;
            (b)      the  United States  and international  patent  applications
and/or provisional applications listed on  Appendix A and the resulting patents;
            (c)      any  patent  applications  resulting  from  the provisional
applications   listed  on  Appendix  A,  and  any  divisionals,   continuations,
continuation-in-part  applications,  and continued prosecution applications (and
their relevant  international  equivalents) of the patent applications listed on
Appendix A and of such patent  applications  that  result  from the  provisional
applications  listed on  Appendix  A, to the extent the claims are  directed  to
subject  matter  specifically  described  in the patent  applications  listed on
Appendix A, and the resulting patents;
            (d)      any patents  resulting from  reissues,  reexaminations,  or
extensions  (and  their  relevant  international  equivalents)  of  the  patents
described in (a), (b), and (c) above; and
            (e)      international  (non-United States) patent  applications and
provisional  applications  filed  after  the  EFFECTIVE  DATE  and the  relevant
international  equivalents to divisionals,  continuations,  continuation-in-part
applications and continued  prosecution  applications of the patent applications
to the extent the claims are directed to subject matter  specifically  described
in the patents or patent  applications  referred to in (a),  (b),  (c),  and (d)
above, and the resulting patents.

                                       4


     1.11  "REPORTING  PERIOD"  shall  begin on the first  day of each  calendar
quarter and end on the last day of such calendar quarter.

     1.12  "RESEARCH  REAGENT  FIELD"  shall mean  research  reagent uses of the
HEPARINASES designated for "research purposes only, not to be used in humans."

     1.13 "SUBLICENSEE"  shall mean any non-AFFILIATE  sublicensee of the rights
granted BIOMARIN under Section 2.1.

     1.14 "TERM" shall mean the term of this Agreement,  which shall commence on
the  EFFECTIVE  DATE  and  shall  remain  in  effect  until  the  expiration  or
abandonment  of all issued  patents  and filed  patent  applications  within the
PATENT RIGHTS,  unless earlier  terminated in accordance  with the provisions of
this Agreement.

     1.15 "TERRITORY" shall mean worldwide.

     1.16  "THERAPEUTIC  FIELD"  shall  mean  human  use of the  HEPARINASES  as
therapeutics  in  pharmaceutical  compositions  for reversal of  anticoagulants,
inflammation, reperfusion injury, restenosis and wound healing.

                               2. Grant of Rights.

     2.1 License Grants.  Subject to the terms of this Agreement,  M.I.T. hereby
grants to BIOMARIN and its  AFFILIATES  for the TERM a  royalty-bearing  license
under the PATENT RIGHTS to develop,  make, have made, use, sell,  offer to sell,
lease,  and  import  LICENSED  PRODUCTS  in the FIELDS in the  TERRITORY  and to
develop and perform LICENSED PROCESSES in the FIELDS in the TERRITORY.

     2.2  Exclusivity.  In order to establish an exclusive  period for BIOMARIN,
M.I.T. agrees that it shall not grant any other license to make, have made, use,
sell,  lease  and  import  LICENSED  PRODUCTS  in the  THERAPEUTIC  FIELD in the
TERRITORY  or to perform  LICENSED  PROCESSES  in the  THERAPEUTIC  FIELD in the
TERRITORY during the TERM.

                                       5


     2.3 Sublicenses.  COMPANY shall have the right to grant  sublicenses of its
exclusive  rights in the  THERAPEUTIC  FIELD under Section 2.1.  BIOMARIN  shall
incorporate  terms and conditions into its sublicense  agreements  sufficient to
enable BIOMARIN to comply with this Agreement.  BIOMARIN shall promptly  furnish
M.I.T.  with  a  fully  signed  photocopy  of  any  sublicense  agreement.  Upon
termination  of this  Agreement  for any  reason,  any  SUBLICENSEE  not then in
default  shall have the right to seek a license  from  M.I.T.  M.I.T.  agrees to
negotiate such licenses in good faith under reasonable terms and conditions.

     2.4 U.S.  Manufacturing.  BIOMARIN agrees that any LICENSED PRODUCTS in the
THERAPEUTIC  FIELD  used or  sold  in the  United  States  will be  manufactured
substantially in the United States.

     2.5 Retained Rights.

            (a)      M.I.T.   M.I.T. retains  the right  to practice  under  the
PATENT RIGHTS in all FIELDS for research, teaching, and educational purposes.

            (b)      Federal Government.  BIOMARIN  acknowledges that  the  U.S.
federal  government  retains  a  royalty-free,  non-exclusive,  non-transferable
license to practice any government-funded invention claimed in any PATENT RIGHTS
as set  forth  in 35  U.S.C.ss.ss.  201-211,  and  the  regulations  promulgated
thereunder, as amended, or any successor statutes or regulations.

     2.6 No Additional  Rights.  Nothing in this Agreement shall be construed to
confer any rights upon BIOMARIN by implication, estoppel, or otherwise as to any
technology or patent rights of M.I.T.  or any other entity other than the PATENT
RIGHTS, regardless of whether such technology or patent rights shall be dominant
or subordinate to any PATENT RIGHTS.

                        3. COMPANY Diligence Obligations.

     3.1 Diligence  Requirements.  BIOMARIN  shall use  commercially  reasonable
diligent  efforts,  or  shall  cause  its  AFFILIATES  and  SUBLICENSEES  to use
commercially  reasonable  diligent  efforts,  to  develop  and to  commercialize
LICENSED  PRODUCTS or LICENSED  PROCESSES and to introduce  LICENSED PRODUCTS or
LICENSED  PROCESSES  into the  commercial  market;  thereafter,  BIOMARIN or its
AFFILIATES or SUBLICENSEES  shall make LICENSED  PRODUCTS or LICENSED  PROCESSES
reasonably  available  to the public.  Specifically,  BIOMARIN or  AFFILIATE  or
SUBLICENSEE shall fulfill the following obligations:

                                       6


            (a)      Within three (3) months after the EFFECTIVE  DATE, BIOMARIN
shall furnish M.I.T. with a written research and development plan describing the
major tasks to be  achieved in order to bring to market a LICENSED  PRODUCT or a
LICENSED  PROCESS in the THERAPEUTIC  FIELD,  specifying the number of staff and
other resources to be devoted to such commercialization effort.

            (b)      Within  sixty  (60) days  after the  end of  each  calendar
year,  BIOMARIN shall furnish  M.I.T.  with a written  report  (consistent  with
Section 5.1(a)) on the progress of its efforts during the immediately  preceding
calendar  year to  develop  and  commercialize  LICENSED  PRODUCTS  or  LICENSED
PROCESSES.  The report shall also contain a discussion  of intended  efforts and
sales projections for the year in which the report is submitted.

            (c)      During  regular business  hours and upon  a mutually agreed
upon date and time,  BIOMARIN  shall  permit an  in-plant  inspection  by M.I.T.
and/or a mutually agreed upon expert  consultant on or before December 31, 2002,
and thereafter  permit in-plant  inspections by M.I.T.  and/or a mutually agreed
upon expert  consultant  at regular  intervals  with at least twelve (12) months
between each such inspection.

            (d)      Beginning on the  EFFECTIVE DATE, BIOMARIN shall  expend at
least  *****  for  the  commercial  development  of  LICENSED  PRODUCTS  in  the
THERAPEUTIC  FIELD,  until either  BIOMARIN's  receipt of approval from the U.S.
Food and Drug Administration  (FDA) for a NDA/BLA covering a LICENSED PRODUCT or
*****

     Should BIOMARIN not receive  approval from the FDA for a NDA/BLA covering a
LICENSED PRODUCT in the THERAPEUTIC FIELD by *****,  M.I.T.'s  obligation not to
grant any other license in the  THERAPEUTIC  FIELD shall  immediately  terminate
unless  M.I.T.  and  BIOMARIN  meet and agree within sixty (60) days on mutually
acceptable  revised  diligence  obligations.  In  addition,  beginning on *****,
BIOMARIN shall expend at least ***** for the commercial  development of LICENSED
PRODUCTS in the THERAPEUTIC  FIELD until either  BIOMARIN's  receipt of approval
from the U.S.  Food and Drug  Administration  (FDA)  for a  NDA/BLA  covering  a
LICENSED PRODUCT or *****.

                                       7


     Should BIOMARIN not receive  approval from the FDA for a NDA/BLA covering a
LICENSED  PRODUCT  in the  THERAPEUTIC  FIELD by *****,  M.I.T.  may treat  such
failure as a material breach in accordance with Section 12.3(b).

            (e)      After  BIOMARIN's  first  commercial  sale  of  a  LICENSED
PRODUCT, BIOMARIN shall make NET SALES according to the following schedule:

       In the first full calendar year after the first commercial sale    *****;
       In the second full calendar year after the first commercial sale   *****;
       Each year thereafter                                               *****.

     In the event that M.I.T.  determines  that  BIOMARIN  (or an  AFFILIATE  or
SUBLICENSEE)  has not fulfilled its  obligations  under  Section  3.1(a-c,f),  ,
M.I.T. shall furnish BIOMARIN with written notice of such  determination,  which
shall state the  consequences  of such  failure,  including  termination  of the
license.  Within sixty (60) days after  receipt of such notice,  BIOMARIN  shall
either (i) fulfill the relevant obligation or, (ii) at M.I.T.'s sole discretion,
negotiate an acceptable schedule of revised diligence obligations, failing which
M.I.T.  may treat such failure as a material  breach in accordance  with Section
12.3(b).

                         4. Royalties and Payment Terms.

     4.1 Consideration for Grant of Rights.

            (a)      Patent Cost Reimbursement.  BIOMARIN shall pay to M.I.T. on
the EFFECTIVE DATE ***** to reimburse  M.I.T.  for its remaining actual expenses
incurred  as of the  EFFECTIVE  DATE in  connection  with  obtaining  the PATENT
RIGHTS. This payment is nonrefundable.

            (b)      License Maintenance Fees.  BIOMARIN shall pay  to M.I.T. an
annual license maintenance fee of ***** on January 1, 2003 and each January 1st,
thereafter.
     This annual license maintenance fee is nonrefundable;  however, the license
maintenance  fee may be credited to running  royalties  subsequently  due on NET
SALES earned during the same calendar  year, if any.  License  maintenance  fees
paid in excess of  running  royalties  due in such  calendar  year  shall not be
creditable to amounts due for future years.

                                       8


            (c)      Running Royalties.  BIOMARIN shall pay to  M.I.T. a running
royalty of:

                     (i)      *****  of NET  SALES by  BIOMARIN, AFFILIATES  and
SUBLICENSEES sold in the THERAPEUTIC FIELD.

                     (ii)     *****  of NET  SALES by BIOMARIN,  AFFILIATES  and
SUBLICENSEES sold in the DIAGNOSTIC FIELD and the RESEARCH REAGENT FIELD.
     Running  royalties shall be payable for each REPORTING  PERIOD and shall be
due to M.I.T. within sixty (60) days of the end of each REPORTING PERIOD. .

            (d)      Milestone Fees.

                     (i)      Upon *****.

                     (ii)     Upon *****.

            (e)      No Multiple Royalties.  If the  manufacture, use, lease, or
sale of  any LICENSED  PRODUCT or the  performance of  any LICENSED  PROCESS  is
covered  by more than one of the PATENT RIGHTS,  multiple royalties shall not be
due.

            (f)      Third  Party Royalties.  In  the  event  that  BIOMARIN  is
legally  required to make royalty  payments to one or more third  parties  whose
patent rights dominate the PATENT RIGHTS, in order to develop,  make, have made,
use, sell, offer to sell,  lease, and import LICENSED PRODUCTS or to perform any
LICENSED  PROCESSES,  BIOMARIN  may offset a total of ***** of such  third-party
payments  against  any  royalty  payments  that  are due to  M.I.T.  in the same
REPORTING PERIOD; provided,  however that in no event shall the royalty payments
under Section 4.1(c) when  aggregated with any other offsets and credits allowed
under this Agreement, be reduced by more than ***** in any REPORTING PERIOD.

     4.2 Payments.

            (a)      Method of Payment. All payments under this Agreement should
be made  payable to  "Massachusetts  Institute  of  Technology"  and sent to the
address identified in Section 14.1. Each payment should reference this Agreement
and identify the obligation under this Agreement that the payment satisfies.

                                       9


            (b)      Payments in  U.S.  Dollars.  All payments  due  under  this
Agreement  shall be drawn on a United States bank and shall be payable in United
States dollars.  Conversion of foreign currency to U.S. dollars shall be made at
the  conversion  rate  existing  in the United  States (as  reported in the Wall
Street  Journal)  on  the  last  working  day  of the  calendar  quarter  of the
applicable  REPORTING  PERIOD.  Such  payments  shall be  without  deduction  of
exchange, collection, or other charges, and, specifically,  without deduction of
withholding or similar taxes or other government  imposed fees or taxes,  except
as permitted in the definition of NET SALES.

            (c)      Late Payments.  Any payments by BIOMARIN  that are not paid
on or before  the date such  payments  are due under this  Agreement  shall bear
interest,  to the extent  permitted by law, at two  percentage  points above the
Prime  Rate of  interest  as  reported  in the Wall  Street  Journal on the date
payment is due.

                             5. Reports and Records.

     5.1 Frequency of Reports.

            (a)      Before First Commercial Sale. Prior to the first commercial
sale of any LICENSED  PRODUCT or first  commercial  performance  of any LICENSED
PROCESS,  BIOMARIN shall deliver reports to M.I.T.  annually,  within sixty (60)
days of the end of each calendar  year,  containing  information  concerning the
immediately preceding calendar year, as further described in Section 5.2.

            (b)      Upon  First  Commercial  Sale  of  a  LICENSED  PRODUCT  or
Commercial  Performance of a LICENSED  PROCESS.  BIOMARIN shall report to M.I.T.
the date of first  commercial  sale of a LICENSED  PRODUCT and the date of first
commercial  performance  of  a  LICENSED  PROCESS  within  sixty  (60)  days  of
occurrence in each country.

            (c)      After  First Commercial  Sale. After  the first  commercial
sale of a  LICENSED  PRODUCT  or  first  commercial  performance  of a  LICENSED
PROCESS,  BIOMARIN shall deliver reports to M.I.T. within sixty (60) days of the
end of each REPORTING PERIOD,  containing information concerning the immediately
preceding REPORTING PERIOD, as further described in Section 5.2.

                                       10


     5.2 Content of Reports and Payments.  Each report  delivered by BIOMARIN to
M.I.T.  shall contain at least the  following  information  for the  immediately
preceding REPORTING PERIOD:

            (i)      the units of LICENSED  PRODUCTS sold, leased or distributed
by BIOMARIN,  its AFFILIATES and  SUBLICENSEES  to independent  third parties in
each  country,  and,  if  applicable,  the number of LICENSED  PRODUCTS  used by
BIOMARIN,  its AFFILIATES and  SUBLICENSEES in the provision of services in each
country;

            (ii)     a description of LICENSED PROCESSES performed  by BIOMARIN,
its AFFILIATES and SUBLICENSEES in each country as may be pertinent to a royalty
accounting hereunder;

            (iii)    the gross price charged by BIOMARIN, its AFFILIATES and
SUBLICENSEES for each LICENSED PRODUCT and, if applicable, the gross price
charged for each LICENSED PRODUCT used to provide services in each country; and
the gross price charged for each LICENSED PROCESS performed by BIOMARIN, its
AFFILIATES and SUBLICENSEES in each country;


            (iv)     calculation  of  NET  SALES  for  the applicable  REPORTING
PERIOD in each country, including a listing of applicable deductions;

            (v)      total  royalty  payable  on  NET  SALES  in  U.S.  dollars,
together with the exchange rates used for conversion, if applicable;

            (vi)     the amount of SUBLICENSE  INCOME received by  BIOMARIN from
each  SUBLICENSEE  and the amount  due to M.I.T.  from such  SUBLICENSE  INCOME,
including  an  itemized  breakdown  of the  sources  of  income  comprising  the
SUBLICENSE INCOME; and

            (vii)    the  number  of sublicenses  entered into  for  the  PATENT
RIGHTS, LICENSED PRODUCTS and/or LICENSED PROCESSES.

                                       11


     If no sales were made and/or no amounts are due to M.I.T. for any REPORTING
PERIOD, the report shall so state.

     5.3 Financial  Statements.  On or before the ninetieth (90th) day following
the close of  BIOMARIN  's fiscal  year,  BIOMARIN  shall  provide  M.I.T.  with
BIOMARIN 's financial  statements for the preceding fiscal year including,  at a
minimum,  a balance  sheet and an income  statement,  certified  by  BIOMARIN 's
treasurer or chief financial officer or by an independent auditor.

     5.4 Records.  BIOMARIN shall  maintain,  and shall cause its AFFILIATES and
SUBLICENSEES to maintain,  complete and accurate  records relating to the rights
and  obligations  under this  Agreement  and any  amounts  payable to M.I.T.  in
relation to this Agreement,  which records shall contain sufficient  information
to permit M.I.T. to confirm the accuracy of any reports  delivered to M.I.T. and
compliance  in other  respects  with this  Agreement.  The relevant  party shall
retain  such  records  for at least  five  (5)  years  following  the end of the
calendar  year to which they  pertain,  during  which time  M.I.T.,  or M.I.T.'s
appointed  agents,  shall have the right, at M.I.T.'s  expense,  to inspect such
records during normal  business hours to verify any reports and payments made or
compliance in other respects under this  Agreement.  In the event that any audit
performed  under this Section  reveals an underpayment in excess of five percent
(5%),  BIOMARIN  shall  bear the full cost of such  audit  and  shall  remit any
amounts due to M.I.T.  within thirty (30) days of receiving  notice thereof from
M.I.T.

                             6. Patent Prosecution.

     6.1  Responsibility  for  PATENT  RIGHTS.   M.I.T.  shall  prepare,   file,
prosecute,  and  maintain all of the PATENT  RIGHTS.  M.I.T.  and its  appointed
patent  attorneys  will use  reasonable  efforts to copy  BIOMARIN on all patent
correspondence as follows:  (a) documents  received from any patent office shall
be provided to BIOMARIN promptly after receipt;  (b) any document to be filed in
any patent office shall be provided in draft form to BIOMARIN sufficiently prior
to such document's  filing to allow for review and comment by BIOMARIN;  and (c)
documents  filed with any patent  office  shall be provided to COMPANY  promptly
after filing. BIOMARIN shall have reasonable  opportunities to advise M.I.T. and
M.I.T.'s  appointed  patent  attorneys and shall  cooperate with M.I.T.  in such
filing, prosecution and maintenance.

                                       12


     6.2  International  (non-United  States)  Filings.  Appendix B is a list of
countries in which patent applications corresponding to the United States patent
applications  listed in Appendix A shall be filed,  prosecuted,  and maintained.
Appendix B may be amended by mutual agreement of BIOMARIN and M.I.T.

     6.3 Payment of Expenses. Payment of all fees and costs, including attorneys
fees,  relating to the filing,  prosecution and maintenance of the PATENT RIGHTS
shall be the responsibility of *****,  whether such amounts were incurred before
or after the EFFECTIVE DATE. *****. In all instances,  M.I.T. shall pay the fees
prescribed for large entities to the United States Patent and Trademark Office.

                                7. Infringement.

     7.1  Notification  of  Infringement.  Each party agrees to provide  written
notice to the other party promptly after becoming aware of any  infringement  of
the PATENT RIGHTS.

     7.2 Right to Prosecute Infringements.

            (a)      BIOMARIN Right  to Prosecute.  So long as  BIOMARIN remains
the  exclusive  licensee of the PATENT  RIGHTS in the  THERAPEUTIC  FIELD in the
TERRITORY, BIOMARIN, to the extent permitted by law, shall have the right, under
its  own  control  and  at  its  own  expense,  to  prosecute  any  third  party
infringement  of the PATENT RIGHTS in the  THERAPEUTIC  FIELD in the  TERRITORY,
subject to Sections  7.4 and 7.5. If required by law,  M.I.T.  shall  permit any
action under this Section to be brought in its name, including being joined as a
party-plaintiff,  provided that BIOMARIN  shall hold M.I.T.  harmless  from, and
indemnify M.I.T.  against, any costs,  expenses, or liability that M.I.T. incurs
in connection with such action.
                     Prior to commencing any such action, BIOMARIN shall consult
with M.I.T. and shall consider the views of M.I.T. regarding the advisability of
the proposed  action and its effect on the public  interest.  BIOMARIN shall not
enter  into  any  settlement,   consent  judgment,   or  other  voluntary  final
disposition  of any  infringement  action under this  Section  without the prior
written consent of M.I.T, such consent shall not be unreasonably withheld.

                                       13


            (b)      M.I.T. Right to  Prosecute. In the  event that BIOMARIN  is
unsuccessful  in  persuading  the alleged  infringer of the PATENT RIGHTS in the
THERAPEUTIC  FIELD to desist or fails to have initiated an  infringement  action
within a reasonable  time after  BIOMARIN  first  becomes aware of the basis for
such action,  M.I.T. shall have the right, at its sole discretion,  to prosecute
such  infringement  infringement of the PATENT RIGHTS in the  THERAPEUTIC  FIELD
under its sole control and at its sole expense,  and any recovery obtained shall
belong to M.I.T.
                     In addition, M.I.T. shall have the right, but  shall not be
obligated,  to  prosecute  at its own  expense all  infringements  of the PATENT
RIGHTS in the DIAGNOSTIC FIELD and RESEARCH REAGENT FIELD and, in furtherance of
such right,  BIOMARIN hereby agrees that M.I.T.  may include BIOMARIN as a party
plaintiff in any such suit,  without expense to BIOMARIN.  The total cost of any
such infringement  action commenced or defended solely by M.I.T.  shall be borne
by M.I.T.,  and M.I.T.  shall keep any  recovery or damages  derived  therefrom,
whether compensatory for past infringement or punitive.

     7.3 Declaratory  Judgment Actions. In the event that a declaratory judgment
action  is  brought  against  M.I.T.  or  BIOMARIN  by a  third  party  alleging
invalidity,  unenforceability, or non-infringement of the PATENT RIGHTS, M.I.T.,
at its option,  shall have the right within thirty (30) days after  commencement
of such action to take over the sole  defense of the action at its own  expense.
If M.I.T. does not exercise this right,  BIOMARIN may take over the sole defense
of the action at BIOMARIN 's sole expense, subject to Sections 7.4 and 7.5.

     7.4 Offsets.  BIOMARIN may offset a total of ***** of any expenses incurred
under  Sections 7.2 and 7.3 against any payments due to M.I.T.  under Article 4,
provided that in no event shall such payments  under Article 4, when  aggregated
with any other offsets and credits allowed under this  Agreement,  be reduced by
more than ***** in any REPORTING PERIOD.

     7.5 Recovery.  Any recovery obtained in an action brought by BIOMARIN under
Sections  7.2 or 7.3 shall be  distributed  as follows:  (i) each party shall be
reimbursed for any expenses  incurred in the action (including the amount of any
royalty or other  payments  withheld  from M.I.T.  as described in Section 7.4),
(ii) as to ordinary damages,  BIOMARIN shall receive an amount equal to its lost
profits or a reasonable royalty on the infringing sales, or whichever measure of
damages the court shall have  applied,  and BIOMARIN  shall pay to M.I.T.  based
upon such amount a reasonable  approximation  of the royalties and other amounts
that  BIOMARIN  would have paid to M.I.T.  if BIOMARIN  had sold the  infringing
products,  processes  and services  rather than the  infringer,  and (iii) as to
special or punitive damages, the parties shall share equally in any award.

                                       14


     7.6  Cooperation.  Each party  agrees to cooperate in any action under this
Article that is  controlled by the other party,  provided  that the  controlling
party  reimburses  the  cooperating  party  promptly  for any costs and expenses
incurred by the cooperating party in connection with providing such assistance.

     7.7 Right to Sublicense. So long as BIOMARIN remains the exclusive licensee
of the PATENT RIGHTS in the  THERAPEUTIC  FIELD in the TERRITORY,  COMPANY shall
have the sole right to sublicense any alleged infringer in the THERAPEUTIC FIELD
in the  TERRITORY  for future use of the PATENT  RIGHTS in  accordance  with the
terms and conditions of this Agreement relating to sublicenses. Any upfront fees
as part of such sublicense  shall be shared equally between BIOMARIN and M.I.T.;
other revenues to BIOMARIN  pursuant to such sublicense  shall be treated as set
forth in Article 4.

                        8. Indemnification and Insurance.

     8.1 Indemnification.

            (a)      Indemnity.  BIOMARIN  shall  indemnify,  defend, and   hold
harmless M.I.T. and its trustees,  officers,  faculty, students,  employees, and
agents and their respective  successors,  heirs and assigns (the "Indemnitees"),
against any liability,  damage, loss, or expense (including reasonable attorneys
fees  and  expenses)  incurred  by or  imposed  upon any of the  Indemnitees  in
connection with any claims, suits, actions,  demands or judgments arising out of
any theory of liability  (including  without  limitation  actions in the form of
tort,  warranty,  or strict  liability and regardless of whether such action has
any factual  basis)  concerning any product,  process,  or service that is made,
used,  sold,  imported,  or performed  pursuant to any right or license  granted
under this Agreement.

            (b)      Procedures.  The Indemnitees agree to provide BIOMARIN with
prompt written notice of any claim, suit, action,  demand, or judgment for which
indemnification  is sought under this  Agreement.  BIOMARIN  agrees,  at its own
expense, to provide attorneys reasonably  acceptable to M.I.T. to defend against
any such claim.  The  Indemnitees  shall  cooperate  fully with BIOMARIN in such
defense and will permit  BIOMARIN  to conduct and control  such  defense and the
disposition of such claim,  suit, or action (including all decisions relative to
litigation,  appeal,  and settlement);  provided,  however,  that any Indemnitee
shall have the right to retain its own counsel,  at the expense of BIOMARIN,  if
representation  of such Indemnitee by the counsel  retained by BIOMARIN would be
inappropriate  because of actual or potential  differences  in the  interests of
such Indemnitee and any other party represented by such counsel. BIOMARIN agrees
to keep M.I.T.  informed of the progress in the defense and  disposition of such
claim and to consult with M.I.T. with regard to any proposed settlement.

                                       15


     8.2  Insurance.  BIOMARIN  shall  obtain and carry in full force and effect
commercial general liability  insurance,  including product liability and errors
and  omissions  insurance  which shall  protect  BIOMARIN and  Indemnitees  with
respect to events covered by Section  8.1(a) above.  Such insurance (i) shall be
issued by an insurer  licensed to practice in the  Commonwealth of Massachusetts
or an insurer  pre-approved  by M.I.T.,  such  approval  not to be  unreasonably
withheld,  (ii) shall list M.I.T.  as an additional  insured  thereunder,  (iii)
shall be endorsed to include product liability coverage,  and (iv) shall require
thirty (30) days written notice to be given to M.I.T.  prior to any cancellation
or material change thereof.  The limits of such insurance shall not be less than
One Million  Dollars  ($1,000,000)  per  occurrence  with an  aggregate of Three
Million Dollars  ($3,000,000)  for bodily injury  including  death;  One Million
Dollars  ($1,000,000)  per occurrence with an aggregate of Three Million Dollars
($3,000,000)  for property  damage;  and One Million  Dollars  ($1,000,000)  per
occurrence  with an aggregate of Three Million Dollars  ($3,000,000)  for errors
and omissions.  In the  alternative,  BIOMARIN may self-insure  subject to prior
approval of M.I.T.  BIOMARIN shall provide M.I.T. with Certificates of Insurance
evidencing  compliance  with this Section.  BIOMARIN  shall continue to maintain
such  insurance or  self-insurance  after the  expiration or termination of this
Agreement  during any period in which  BIOMARIN or any AFFILIATE or  SUBLICENSEE
continues (i) to make, use, or sell a product that was a LICENSED  PRODUCT under
this  Agreement or (ii) to perform a service that was a LICENSED  PROCESS  under
this Agreement, and thereafter for a period of five (5) years.

                      9. No Representations or Warranties.

     EXCEPT AS MAY  OTHERWISE BE EXPRESSLY SET FORTH IN THIS  AGREEMENT,  M.I.T.
MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND CONCERNING THE PATENT RIGHTS,
EXPRESS OR IMPLIED,  INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR  PURPOSE,  NONINFRINGEMENT,  VALIDITY OF PATENT  RIGHTS
CLAIMS,  WHETHER ISSUED OR PENDING,  AND THE ABSENCE OF LATENT OR OTHER DEFECTS,
WHETHER  OR NOT  DISCOVERABLE.  Specifically,  and not to limit  the  foregoing,
M.I.T.  makes no warranty or representation  (i) regarding the validity or scope
of the PATENT RIGHTS, and (ii) that the exploitation of the PATENT RIGHTS or any
LICENSED  PRODUCT or LICENSED  PROCESS  will not  infringe  any patents or other
intellectual property rights of M.I.T. or of a third party.

                                       16


     IN NO EVENT SHALL M.I.T., ITS TRUSTEES, DIRECTORS,  OFFICERS, EMPLOYEES AND
AFFILIATES  BE LIABLE  FOR  INCIDENTAL  OR  CONSEQUENTIAL  DAMAGES  OF ANY KIND,
INCLUDING ECONOMIC DAMAGES OR INJURY TO PROPERTY AND LOST PROFITS, REGARDLESS OF
WHETHER  M.I.T.  SHALL BE ADVISED,  SHALL HAVE OTHER REASON TO KNOW,  OR IN FACT
SHALL KNOW OF THE POSSIBILITY OF THE FOREGOING.

                                 10. Assignment.

     This Agreement is personal to COMPANY and no rights or  obligations  may be
assigned by COMPANY  without the prior  written  consent of M.I.T.,  except that
COMPANY may assign its rights and obligations  under this Agreement without such
prior consent to an AFFILIATE or to a successor in  connection  with the merger,
consolidation, or sale of all or substantially all of its assets or that portion
of its business to which this Agreement relates;  provided,  however,  that this
Agreement shall  immediately  terminate if the proposed  assignee,  including an
AFFILIATE,  fails to agree in writing to be bound by the terms and conditions of
this Agreement on or before the effective date of the assignment.

                        11. General Compliance with Laws

     11.1 Compliance with Laws. BIOMARIN shall use reasonable commercial efforts
to  comply  with  all  commercially   material  local,   state,   federal,   and
international  laws and regulations  relating to the  development,  manufacture,
use, and sale of LICENSED PRODUCTS and LICENSED PROCESSES.

                                       17


     11.2 Export  Control.  BIOMARIN and its AFFILIATES and  SUBLICENSEES  shall
comply with all United  States laws and  regulations  controlling  the export of
certain commodities and technical data,  including without limitation all Export
Administration  Regulations of the United States  Department of Commerce.  Among
other things,  these laws and regulations  prohibit or require a license for the
export  of  certain  types  of  commodities  and  technical  data  to  specified
countries. BIOMARIN hereby gives written assurance that it will comply with, and
will cause its  AFFILIATES  and  SUBLICENSEES  to comply with, all United States
export control laws and regulations,  that it bears sole  responsibility for any
violation  of  such  laws  and  regulations  by  itself  or  its  AFFILIATES  or
SUBLICENSEES,  and that it will indemnify,  defend, and hold M.I.T. harmless (in
accordance with Section 8.1) for the consequences of any such violation.

     11.3 Non-Use of M.I.T.  Name.  BIOMARIN and its AFFILIATES and SUBLICENSEES
shall not use the name of  "Massachusetts  Institute  of  Technology,"  "Lincoln
Laboratory" or any variation,  adaptation, or abbreviation thereof, or of any of
its  trustees,  officers,  faculty,  students,  employees,  or  agents,  or  any
trademark  owned by M.I.T.,  or any terms of this  Agreement in any  promotional
material or other public  announcement  or disclosure  without the prior written
consent of M.I.T. The foregoing notwithstanding,  without the consent of M.I.T.,
BIOMARIN  may  state  that it is  licensed  by  M.I.T.  under one or more of the
patents and/or patent applications comprising the PATENT RIGHTS.

     11.4 Marking of LICENSED PRODUCTS.  To the extent commercially feasible and
consistent with prevailing  business  practices,  BIOMARIN shall mark, and shall
cause its AFFILIATES and  SUBLICENSEES  to mark, all LICENSED  PRODUCTS that are
manufactured or sold under this Agreement with the number of at least one issued
patent under the PATENT RIGHTS that applies to such LICENSED PRODUCT.

                                12. Termination.

     12.1 Voluntary  Termination  by BIOMARIN.  BIOMARIN shall have the right to
terminate this Agreement, for any reason, (i) upon at least six (6) months prior
written notice to M.I.T.,  such notice to state the date at least six (6) months
in the future upon which  termination is to be effective,  and (ii) upon payment
of all amounts due to M.I.T. through such termination effective date.

     12.2  Cessation  of Business.  If BIOMARIN  ceases to carry on its business
related  to this  Agreement,  M.I.T.  shall  have the  right to  terminate  this
Agreement immediately upon written notice to BIOMARIN.

                                       18


     12.3 Termination for Default.

            (a)      Nonpayment.  In the event BIOMARIN fails to pay any amounts
due and  payable to M.I.T.  hereunder,  and fails to make such  payments  within
thirty (30) days after  receiving  written  notice of such failure,  M.I.T.  may
terminate this Agreement immediately upon written notice to BIOMARIN.

            (b)      Material Breach.  In the event BIOMARIN  commits a material
breach of its obligations  under this Agreement,  except for breach as described
in Section  12.3(a),  and fails to cure that breach within sixty (60) days after
receiving   written  notice  thereof,   M.I.T.   may  terminate  this  Agreement
immediately upon written notice to BIOMARIN.

     12.4 Effect of Termination.

            (a)      Survival.  The  following  provisions  shall  survive   the
expiration or  termination of this  Agreement:  Articles 1, 8, 9, 13 and 14, and
Sections 5.2  (obligation to provide final report and payment),  5.4, 11.1, 11.2
and 12.4.

            (b)      Inventory.  Upon the  early termination  of this Agreement,
BIOMARIN  and  its  AFFILIATES  and  SUBLICENSEES  may  complete  and  sell  any
work-in-progress  and  inventory  of  LICENSED  PRODUCTS  that  exist  as of the
effective  date of  termination,  provided  that (i)  BIOMARIN  pays M.I.T.  the
applicable  running  royalty  or other  amounts  due on such  sales of  LICENSED
PRODUCTS in accordance with the terms and conditions of this Agreement, and (ii)
BIOMARIN  and its  AFFILIATES  and  SUBLICENSEES  shall  complete  and  sell all
work-in-progress  and inventory of LICENSED PRODUCTS within six (6) months after
the effective date of termination.

            (c)      Pre-termination Obligations.  In no event shall termination
of this  Agreement  release  BIOMARIN,  AFFILIATES,  or  SUBLICENSEES  from  the
obligation to pay any amounts that became due on or before the effective date of
termination.

                             13. Dispute Resolution.

     13.1 Mandatory  Procedures.  The parties agree that any dispute arising out
of or  relating  to this  Agreement  shall be  resolved  solely  by means of the
procedures  set  forth in this  Article,  and that  such  procedures  constitute
legally binding  obligations that are an essential  provision of this Agreement.
If either  party  fails to observe the  procedures  of this  Article,  as may be
modified  by their  written  agreement,  the other party may bring an action for
specific performance of these procedures in any court of competent jurisdiction.

                                       19


     13.2 Equitable Remedies.  Although the procedures specified in this Article
are the sole and exclusive procedures for the resolution of disputes arising out
of or relating to this Agreement, either party may seek a preliminary injunction
or other  provisional  equitable  relief if, in its  reasonable  judgment,  such
action is  necessary  to avoid  irreparable  harm to itself or to  preserve  its
rights under this Agreement.

     13.3 Dispute Resolution Procedures.

            (a)      Mediation.  In the  event any  dispute  arising  out of  or
relating to this Agreement  remains  unresolved  within sixty (60) days from the
date the affected party  informed the other party of such dispute,  either party
may initiate  mediation upon written notice to the other party ("Notice  Date"),
whereupon  both parties  shall be obligated to engage in a mediation  proceeding
under the then current Center for Public  Resources  ("CPR") Model Procedure for
Mediation of Business  Disputes  (http://www.cpradr.org),  except that  specific
provisions of this Article  shall  override  inconsistent  provisions of the CPR
Model Procedure.  The mediator will be selected from the CPR Panels of Neutrals.
If the parties cannot agree upon the selection of a mediator within fifteen (15)
business days after the Notice Date, then upon the request of either party,  the
CPR shall appoint the mediator. The parties shall attempt to resolve the dispute
through mediation until the first of the following occurs: (i) the parties reach
a written  settlement;  (ii) the  mediator  notifies the parties in writing that
they have reached an impasse;  (iii) the parties agree in writing that they have
reached an impasse;  or (iv) the parties  have not reached a  settlement  within
sixty (60) days after the Notice Date.

            (b)      Trial Without Jury.  If the  parties fail  to  resolve  the
dispute  through  mediation,  or if neither party elects to initiate  mediation,
each party shall have the right to pursue any other remedies  legally  available
to resolve the dispute, provided,  however, that the parties expressly waive any
right to a jury trial in any legal proceeding under this Article.

     13.4  Performance  to  Continue.  Each party shall  continue to perform its
undisputed  obligations  under this  Agreement  pending final  resolution of any
dispute arising out of or relating to this Agreement;  provided, however, that a
party may suspend performance of its undisputed obligations during any period in
which the other party fails or refuses to perform  its  undisputed  obligations.
Nothing in this Article is intended to relieve  BIOMARIN from its  obligation to
make undisputed payments pursuant to Articles 4 and 6 of this Agreement.

                                       20


     13.5 Statute of Limitations. The parties agree that all applicable statutes
of limitation  and  time-based  defenses  (such as estoppel and laches) shall be
tolled  while the  procedures  set forth in Sections  13.3(a) are  pending.  The
parties shall cooperate in taking any actions necessary to achieve this result.

                               14. Miscellaneous.

     14.1 Notice.  Any notices  required or permitted under this Agreement shall
be in writing, shall specifically refer to this Agreement,  and shall be sent by
hand, recognized national overnight courier,  confirmed facsimile  transmission,
confirmed  electronic  mail, or registered or certified mail,  postage  prepaid,
return receipt requested, to the following addresses or facsimile numbers of the
parties:

         If to M.I.T.:              Technology Licensing Office, Room NE25-230
                                    Massachusetts Institute of Technology
                                    77 Massachusetts Avenue
                                    Cambridge, MA  02139-4307
                                    Attention:  Director
                                    Tel:    617-253-6966
                                    Fax:    617-258-6790

         If to BIOMARIN:            BioMarin Pharmaceutical Inc.
                                    371 Bel Marin Keys Blvd., Suite 210
                                    Novato, CA 94949
                                    Attention: Emil Kakkis, M.D., Ph.D.
                                    Tel: 415-884-6704
                                    Fax: 415-382-7889

     All notices under this Agreement shall be deemed effective upon receipt.  A
party may change its contact information  immediately upon written notice to the
other party in the manner provided in this Section.

                                       21


     14.2  Governing  Law.  This  Agreement  and all disputes  arising out of or
related  to  this  Agreement,  or  the  performance,   enforcement,   breach  or
termination  hereof,  and any remedies  relating  thereto,  shall be  construed,
governed,   interpreted   and  applied  in  accordance  with  the  laws  of  the
Commonwealth  of  Massachusetts,  U.S.A.,  without  regard to  conflict  of laws
principles,  except that questions  affecting the construction and effect of any
patent shall be  determined  by the law of the country in which the patent shall
have been granted.

     14.3 Force Majeure.  Neither party will be responsible for delays resulting
from  causes  beyond the  reasonable  control of such party,  including  without
limitation  fire,  explosion,  flood,  war, strike,  or riot,  provided that the
nonperforming party uses commercially reasonable efforts to avoid or remove such
causes of  nonperformance  and resumes  performance  under this  Agreement  with
reasonable dispatch whenever such causes are removed.

     14.4 Amendment and Waiver. This Agreement may be amended,  supplemented, or
otherwise modified only by means of a written instrument signed by both parties.
Any waiver of any rights or failure to act in a specific  instance  shall relate
only to such  instance  and shall not be  construed as an agreement to waive any
rights or fail to act in any other instance, whether or not similar.

     14.5 Severability.  In the event that any provision of this Agreement shall
be  held  invalid  or   unenforceable   for  any  reason,   such  invalidity  or
unenforceability shall not affect any other provision of this Agreement, and the
parties  shall  negotiate in good faith to modify the  Agreement to preserve (to
the extent  possible)  their  original  intent.  If the parties  fail to reach a
modified  agreement within thirty (30) days after the relevant provision is held
invalid or unenforceable,  then the dispute shall be resolved in accordance with
the procedures set forth in Article 13. While the dispute is pending resolution,
this Agreement shall be construed as if such provision were deleted by agreement
of the parties.

     14.6 Binding Effect.  This Agreement shall be binding upon and inure to the
benefit of the parties and their respective permitted successors and assigns.

     14.7 Headings.  All headings are for convenience  only and shall not affect
the meaning of any provision of this Agreement.

                                       22


     14.8 Entire  Agreement.  This Agreement  constitutes  the entire  agreement
between the parties with respect to its subject  matter and supersedes all prior
agreements or understandings between the parties relating to its subject matter.

     IN WITNESS  WHEREOF,  the parties have caused this Agreement to be executed
by their duly authorized representatives.

The EFFECTIVE DATE of this Agreement is September 5, 2002.


                                               

MASSACHUSETTS INSTITUTE OF                        BIOMARIN PHARMACEUTICAL INC
TECHNOLOGY


By:      /s/ Lita Nelson                          By:  /s/ Emil Kakkis
   --------------------------------------            -----------------------------------
Name:    Lita Nelson                              Name: Emil Kakkis, M.D., Ph.D.
     ------------------------------------              ---------------------------------
Title:   Director of Technology Licensing         Title: Senior V.P., Scientific Affairs
      -----------------------------------               --------------------------------



                                       23



                                   APPENDIX A

                     List of Patent Applications and Patents


I.       United States Patents and Applications

M.I.T. Case No. 4176
Entitled: "The Heparinase Activated Clotting Time: A New Coagulation Test"
By Judah Folkman, Robert L. Hannon, Robert S. Langer and Robert W. Thompson

         United States Patent No. 4795703, Issued January 3, 1989
         Entitled "HEPARIN ASSAY"


M.I.T. Case No. 4330
Entitled: "Procedure For Purification Of High Purity Heparinase"
By Charles L. Cooney and Joseph J. Zimmermann

         United States Patent No. 5169772, Issued December 8, 1992
         Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY
         HEPARINASE"


M.I.T. Case No. 5546
Entitled: "The Heparinase Gene From Flavobacterium Heparinum"
By Charles L. Cooney, Robert S. Langer, Kelley W. Moreman and Ram Sasisekharan

         United States Patent No. 5830726, Issued November 3, 1998
         Entitled "METHOD FOR OBTAINING A MODIFIED HEPARINASE GENE"

         United States Patent No. 5714376, Issued February 3, 1998
         Entitled "THE HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"


M.I.T. Case No. 5981
Entitled: "Purification,  Composition And Characterization Of Heparinase II From
Flavobacterium Heparinum"
By Charles L. Cooney, Robert S. Langer,  Robert Lindhardt,  Daniel Lohse and Ram
Sasisekharan

         United States Patent No. 5569600, Issued October 29, 1996
         Entitled "PURIFICATION, COMPOSITION AND SPECIFICITY OF HEPARINASE I, II
         & III FROM FLAVOBACTERIUM HEPARINUM"

         United States Patent No. 5389539, Issued February 14, 1995
         Entitled "PURIFICATION, COMPOSITION AND SPECIFICITY OF HEPARNASE I, II,
         AND III FROM FLAVOBACTERIUM HEPARINUM";

                                       24


II.      International (non-U.S.) Patents and Applications


M.I.T. Case No. 4176
Entitled: "The Heparinase Activated Clotting Time: A New Coagulation Test"
By Judah Folkman, Robert L. Hannon, Robert S. Langer and Robert W. Thompson

         Germany Patent No. P3778616.4, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         Austria Patent No. 75503, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         Luxembourg Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         United Kingdom Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         Sweden Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASSAY";

         Italy Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         Switzerland Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         Belgium Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASSAY"

         France Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPRIN ASSAY";

         Netherlands Patent No. 0259463, Issued April 29, 1992
         Entitled "HEPARIN ASAY

         Canada Patent No. 1288673, Issued September 10, 1991
         Entitled "HEPARIN ASSAY"

         Japan Patent No. 2632525, Issued April 25, 1997
         Entitled "HEPARIN ASSAY";


                                       25



M.I.T. Case No. 4236
Entitled: "Neutralization Of The Anticoagulant  Activities Of The Low  Molecular
Weight Heparin Fractions And Fragments With Flavobacterial Heparinase"
By Howard Bernstein, Charles L. Cooney, Robert S. Langer and Victor C. Yang

         Canada Patent No. 1298550, Issued April 7, 1992
         Entitled ""NEUTRALIZATION OF THE ANTICOAGULANT ACTIVITIES OF LOW
         MOLECULAR WEIGHT HEPARIN"


M.I.T. Case No. 4330
Entitled: "Procedure For Purification Of High Purity Heparinase"
By Charles L. Cooney and Joseph J. Zimmermann

        Japan Patent Patent No. 2603349, Issued January 29, 1997
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Japan Patent No. 2869039, Issued December 25, 1998
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Canada Patent No. 1341079, Issued August 8, 2000
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Austria Patent No. E113991, Issued November 9, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Sweden Patent No. 0420894, Issued November 4, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Netherlands Patent No. 0420894, Issued November 4, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Luxembourg Patent No. 89907019, Issued November 4, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Italy Patent No. 0420894, Issued November 4, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

                                       26


        United Kingdom Patent No. 0420894, Issued November 4, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        France Patent No. 0420894, Issued November 4, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Germany Patent No. 68919360, Issued November 9, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Switzerland Patent No. 0420894, Issued November 9, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"

        Belgium Patent No. 0420894, Issued November 9, 1994
        Entitled "LARGE SCALE METHOD FOR PURIFICATION OF HIGH PURITY HEPARINASE"


M.I.T. Case No. 4370
Entitled:"Extracorporeal Systems For Heparin Neutralizaton Using  Porous Fibers
Or Tubes"
By Ann R. Comfort, Robert A. Heft and Robert S. Langer

         Switzerland Patent No. 0354916, Issued September 30, 1992
         Entitled "NEUTRALIZATON OF HEPARIN"

         United Kingdom Patent No. 0354916, Issued September 30, 1992
         Entitled "NEUTRILIZATION OF HEPARIN"

         France Patent No. 0354916, Issued September 30, 1992
         Entitled "NEUTRLIZATION OF HEPARIN"

         Germany Patent No. P3875114.3, Issued September 30, 1992
         Entitled "NEUTRALIZATION OF HEPARIN"

         Canada Patent No. 1315676, Issued April 6, 1993
         Entitled "HEPARIN NEUTRALIZATION USING COMPOUNDS IMMOBILIZED AND IN
         DIRECT CONTACT WITH WHOLE BLOOD"


M.I.T. Case No. 5546
Entitled: "The Heparinase Gene From Flavobacterium Heparinum"
By Charles L. Cooney, Robert S. Langer, Kelley W. Moreman and Ram Sasisekharan

         Ireland Patent Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         United Kingdom Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

                                       27



         Spain Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Germany Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Sweden Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Monaco Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Liechtenstein Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         France Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Greece Pate Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Italy Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Luxembourg Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Netherlands Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Austria Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

                                       28


         Belgium Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Switzerland Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Denmark Patent No. 0610408, Issued December 29, 1997
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"

         Japan Patent Application Serial No. 5-507945, Filed October 22, 1992
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM" Patent
         Pending.

         Canada Patent Application Serial No. 2122004, Filed October 22, 1992
         Entitled "HEPARINASE GENE FROM FLAVOBACTERIUM HEPARINUM"
         Patent Pending.


M.I.T. Case No. 5981
Entitled: "Purification, Composition And Characterization Of  Heparinase II From
Flavobacterium Heparinum"
By Charles L. Cooney, Robert S. Langer,  Robert Lindhardt,  Daniel Lohse and Ram
Sasisekharan

         Japan Patent Application Serial No. 6-513425, Filed November 30, 1993
         Entitled "PURIFICATION COMPOSITION AND SPECIFICITY OF HEPARINASE I, II,
         AND II FROM FLAVOBACTERIUM HEPARINUM" Patent Pending.

         EPC Patent Application Serial No. 94902450.9, Filed November 30, 1993
         Entitled "PURIFICATION COMPOSITION AND SPECIFICITY OF HEPARINASE I, II,
         AND II FROM FLAVOBACTERIUM HEPARINUM" Patent Pending.

         Canada Patent No. 2150263, Issued August 4, 1998
         Entitled "PURIFICATION COMPOSITION AND SPECIFICITY OF HEPARINASE I, II,
         AND III FROM FLAVOBACTERIUM HEPARINUM";


                                       29



                                   APPENDIX B
              List of Countries (excluding United States) for which
       PATENT RIGHTS Applications Will Be Filed, Prosecuted and Maintained











                                   APPENDIX C
                              The "IBEX Agreements"




                           [Omitted to Conserve Space]


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