EXHIBIT 10.16

LETTER OF ACCEPTANCE


CLIENT:  Michael Wilhelm                              DATE:      2-Oct-03
         ImmuneRegen Biosciences, Inc.
         Corporate Offices                            OUR REF:   Q3451
         8655 Via de Ventura Blvd., Suite E-155
         Scottsdale, AZ 85258

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STUDY NUMBER:        To be issued                     FEE:       $95,000*
STUDY TYPE:          A 2-Week Inhalation Toxicity Study in Rats (GLP)

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METHOD OF PAYMENT:
                       Payment   Payment
                       No.       Amount               Date Payment Due
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Analytical Method
Feasibility*           1         $  8,000 (1 week)    Upon Completion

Additional
Feasibility*           2         $  1,500/day         Upon Completion

In-Life Study          3         $ 23,750             Upon Authorization

In-Life Study          4         $ 42,750             Completion of In-Life

In-Life Study          5         $ 19,000             Submission of Draft Report

In-Life Study          6         $  9,500             Submission of Final Report

*   Price includes one week of feasibility. Additional feasibility intervals, if
    required, will be at $1,500/day.

**  Or 30 days after submission of draft report if no comments are received from
    the client.

TERMS:   Net 7 Days (See Section 8 in "Attachment A")

         If Client  postpones the study, a weekly fee of $6,000 will be incurred
         to retain room (See Section 14 in "Attachment A")

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To confirm your acceptance of this contract, please
return one copy, duly signed, to the Contracts Dept.
Issued on behalf of Huntingdon Life Sciences, Inc.
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Name:  Arpad J. Madarasz, DVM
Date:    2-Oct-03
Signed:

Please apply for instructions regarding consignment of samples.
Accepted on behalf of Client
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Name:
Date:
Signed:

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THIS LETTER OF ACCEPTANCE IS VALID FOR A PERIOD OF THREE MONTHS FROM DATE OF
ISSUE. THIS LETTER OF ACCEPTANCE AND ANY CONTRACT BETWEEN HUNTINGDON LIFE
SCIENCES AND THE CLIENT FOR THE CONDUCT OF THE ABOVE STUDY ARE SUBJECT TO THE
STANDARD CONDITIONS PRINTED IN ATTACHMENT A.



                                                                      Huntington
                                                                   Life Sciences

                                  ATTACHMENT A

                                   CONDITIONS

Any study (the study')  undertaken by Huntingdon Life Sciences Inc  (hereinafter
referred  to as the  Company)  will be  carried  out  subject  to the  following
conditions.

Confidentiality
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1.       The Client shall not, without the prior written consent of the Company,
make any use of or  disclose  to any third party the  quotation  any  subsequent
quotation,  any correspondence  between the parties or any experimental data and
reports  arising  as a  result  of the  study  save  that  (but  subject  to the
provisions of paragraph 3 below):

(i)      the  Client  may use the  experimental  data and  reports  arising as a
result of the study for the purpose of its own evaluation',

(ii)     the Client may make disclosure of such correspondence, data and reports
on a confidential  basis to regulatory  authorities,  the Client's  licensees or
members of the Client's consortium sponsoring the study', and

(iii)    the Client may disclose to third parties complete copies of the reports
arising  as result of the  study or  factual  and  complete  extracts  from such
reports provided that such extracts give a true and fair view of the results set
out in such reports.

2.       The Company shall keep confidential and shall not disclose to any third
party without the prior written consent of the Client any information related to
any work done in connection with the study or any information  acquired from the
Client  unless in the  Company's  opinion the health and well being of a patient
(or patients) or the public interest is prejudiced  thereby. No disclosure shall
be made without the Company having first informed the Client.


3.       Any public  disclosure  by the Client of any  information  or  document
relating  to or  arising  as a result of the study  (including  information  and
documents  referred to in paragraph 1 above) shall not without the prior written
consent of the Company directly or indirectly identify or otherwise refer to the
Company (whether under its corporate or any other name) in connection  therewith
save that the Client may refer to the Company when making disclosure pursuant to
subparagraph (iii) of paragraph 1 above provided that no reference shall be made
to the Company in connection with any conclusion or opinion of the Client and no
report or extract from such a report or  reference to the Company  shall be used
to endorse or imply approval of any compound or product of the Client or the use
or proposed use of any compound or product of the Client.

Health and Safety
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4.       It is a condition of the Company  undertaking the study that the Client
shall provide the Company with all  information  available to it regarding known
or potential hazards  associated with the use of any substances  supplied to the
Company  by the  Client  and that  the  Client  shall  comply  with all  current
legislation  and regulations  concerning  shipment of substances by road, sea or
air.

Prices
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5.       The prices shown in the Letter of  Acceptance,  the terms of which form
an integral part of the  contract,  are based on our best  understanding  of the
services required at the time this document was prepared. Additional charges may
be made  based on a review of the final  signed  protocol.  In  addition,  minor
deviations from the work to be performed under the contract may become necessary
(i) for  veterinary  services  to  protect  the  health  and well being of study
animals  (ii) because of results  observed  during the course of the study which
require additional services to be performed or (iii) because services have to be
performed during holiday or overtime periods.  Such additional  charges will not
exceed $10,000 without the Client's  written  consent.  The contract study price
excludes all costs  associated with the shipment of raw data,  specimens or test
materials, for which the Client is wholly responsible.


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                                                                       June 2002


6.       Any  major  changes  to the work to be  performed  under  the  contract
required by the Client shall be notified by the Client to the Company in writing
and will be subject of a mutually  agreed exchange in scope'' or additional work
notice'' amendment  applying under the existing contract,  which may be taken in
substitution  for or as an addition to the original price quoted in the contract
(but  without  prejudice  to the  Company's  right to payment  for work  already
carried out under the original contract).

Consultancy and Scientific Services
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7.       Professional  and scientific  advice provided by the company leading to
the  construction  of a protocol  for a study is included in the prices shown in
the  Letter  of  Acceptance.  In the  event  that the  Company  is not  asked to
undertake  the work involved in such a study a charge based on our normal hourly
rates and not to exceed  $5,000  shall be paid by the  Client.  If,  during  the
sparse of the study,  consultants services provided at the request of the Client
by the Study Director or other scientific personnel are over and above the hours
normally  included as part of the study, then the Company will advise the Client
of this fact and notify the Client of the estimated additional charge which will
be made.

Payment Terms
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8.       Charges for the study, as specified in the 'letter of Acceptance''  and
traditional Work notices, are due upon completion of each milestone. The company
will periodically  submit to the Client an misapplication  for Payment'' listing
the Study Number, Study Title, and the applicable  milestone payment.  Milestone
payments are due and payable by the Client  within  seven days of the  milestone
completion date.

9.       Should  payment not be received,  the Company  reserves the right after
giving due notice to the Client, to stop all work on the study and to dispose of
any  salable  stock or other  items  employed in  connection  therewith  and the
Company shall be entitled to hold or apply the proceeds of such disposal against
unpaid accounts, but without prejudice to any other rights or remedies available
to the Company under law.

Good Laboratory Practice
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10.      Unless otherwise agreed in the study protocol, the Company will conduct
the  study  in  compliance  with  all  relevant  and  officially  declared  good
laboratory  practice  regulations  and  standards.  11.  Client  agrees to allow
government  regulatory  inspections  free and  ready  access  to data,  reports,
specimens and other materials  during GLP directed or surveillance  inspections.
Clients who wish to make their own GLP or quality  assurance  inspections may be
subject to an additional charge.

Reports
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12.      On completion of the study as set out in the quotation the Company will
provide, in suitable form, a report of the study.

Commencement of Study
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13.      The  Commencement  of the study is defined as the first day a member of
the Company staff begins to work on the protocol or once the Client has approved
this  Letter of  Acceptance.  In the event of delay by the  Client  the  Company
reserves  the  right to  implement  a charge  and to  re-schedule  such  work to
commence on a later date. The Company will use its best endeavors to ensure that
such re-scheduling is to the earliest available date.

Study Postponement
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14.      In the event the Client postpones  initiation of the study, the Company
will make every  effort to  reschedule  the study at minimal cost to the Client.
However,  any study  postponed  by the Client  within 28 calendar  days prior to
receipt of animals will be subject to a weekly fee,  which will allow the Client
to retain the room and delay dose  initiation.  In addition,  the Client will be
billed  for all costs  incurred  and  irrevocably  committed  up to the point of
postponement,  including but not limited to time, resources and materials,  such
as the cost of animal maintenance,  study procedures that have to be repeated or
materials  purchased for the study that expire or have to be  re-purchased,  and
any other  study  specific  costs  incurred  on behalf of the  Client due to the
postponement.  Should the period of  postponement  be uncertain or lengthy,  the
Client may cancel the study,  as described in paragraph 16.


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Time
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15.      The Company  will use its best  endeavors to ensure that all study time
schedules  which are agreed  with the  Client  shall be met.  However,  any time
schedules  agreed  for a study or  delivery  of a report are of  necessity  best
estimates only and are not of the essence.

Early Termination of Study
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16.      Once the study has  commenced,  as defined in paragraph  13 above,  the
Client may by notice in writing to the he Company to terminate  the study prior'
to completion. On receipt of such notification by the Company request t Company,
all work will  terminate as  expeditiously  as possible in  accordance  with the
Client's instructions.  Any study cancelled by the Client will be subject to the
following  fees:  Direct  expenses  only,  if cancelled 28 or more days prior to
receipt  of  animals',  direct  expenses  + 10% of the  value of the  study,  if
cancelled  21-27 days prior to receipt of 1 animals',  direct  expenses + 20% of
the value;  of the study,  if cancelled 14-20 days prior to receipt of animals',
direct expenses + 30% of the total value of the study, if cancelled less than 14
days prior to receipt of animals',  direct  expenses + 30% of the total value of
the study  remaining  at the time the  Company  receives  notification  of early
termination,  if cancelled after receipt of animals, Direct expenses include all
costs  and  expenses  incurred  and  irrevocably   committed  to  the  point  of
termination  of the study,  including  but not  limited to costs of animals  and
their  maintenance  and any other study specific costs incurred on behalf of the
Client. Payment of the said charge will be due on presentation of the account.

17.      Should the Company be  prevented  from  carrying out or  continuing  to
carry out the study or any part  thereof  by reason of  legislation,  Government
prohibition, fire, storm, explosion, war hostilities, the deliberate sabotage of
the study by any person,  civil  commotion,  industrial  disputes,  cessation or
failure of public  services or any other  supplier to the  Company,  of goods or
services,  disease,  Act of God,  or any other  event  beyond the control of the
Company,  the Client or the Company will be entitled to  terminate  the study by
giving notice to that effect to the other party. All costs, expenses and charges
associated  with the  termination  of the study in these  circumstances  will be
dealt with as in paragraph 16 above and the Company  shall be under no liability
whatsoever  to the Client by reason of the  occurrence  of any such event or the
termination of the study as provided in paragraph 19 below.

Liability and Indemnity
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18.      Except as may be the  direct  result  of gross  negligence  or  willful
misconduct by the Company,  the Company  shall be under no liability  whatsoever
for all or any losses,  damages,  claims, costs, charges or expenses suffered or
incurred by the Client or any third party resulting directly or indirectly from:

(i)      negligence, arts, defaults or omissions of any suppliers to the Company
of  equipment,  services,  feeds or goods or any other  supplies  of  whatsoever
nature or from any defect or deficiency in any supplies or from the  negligence,
ants,  defaults  or  omissions  of any  correspondents,  consultants,  agents or
independent contractors of the Company',

(ii)     the occurrence of any of the events  described in paragraph 17 above or
the termination of the study following any such event;

(iii)    all or any  actions,  proceedings,  demands or claims made  against the
Client or any third party by any person whatsoever.

19.      The Client shall indemnify the Company,  and the Company shall be under
no liability  whatsoever,  for all or any  consequential  or indirect  losses or
damages or loss of profit  suffered or incurred by the Client or customer of the
Client, or any third party howsoever caused.

20.      In any  event  and  notwithstanding  the terms  contained  herein,  the
Company's liability will not in any circumstances exceed the value of the study.

21.      Except as may be the  direct  result  of gross  negligence  or  willful
misconduct  by the  Company,  the Client  shall  indemnify  and hold the Company
harmless against all actions,  proceedings,  demands,  claims, losses,  damages,
costs, charges,  expenses and all liability whatsoever which may be made against
the Company or which the Company may sustain,  pay or incur arising out of or in
connection with all or any actions, proceedings,  demands or claims made against
the Client or any  customer of the Client or any person or persons  dealing with
the Client by any person whatsoever.


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                                                                       June 2002



Patents
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22.      The Client  warrants to the Company  that the Client owns all  relevant
rights or has obtained all  necessary  licenses  from the owner/  owners of such
rights to enable the  Company  to keep  and/or  use the test  material  or other
materials  to be  used  by the  Company  in the  conduct  of the  study  without
infringing any third party intellectual property rights.

23.      The Client shall indemnify and keep the Company indemnified against any
and all losses damages costs and expenses suffered or incurred by the Company by
reason of the breach of the foregoing warranty.

Retention of Study Data
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24.      A1l  experimental  data  arising from  performance  of the study by the
Company (including documentary raw data, specimens, records and other materials,
collectively  materials)  will remain the property of the Client.  However,  the
Client  agrees that the Company shall retain the  materials  resulting  from the
performance  of a study and the Company so agrees to retain said  materials upon
completion of a study,  for a period of one year. After such period of time, the
Company  will make  reasonable  efforts to contact  the Client at the last known
address  of the  Client  giving  them  the  opportunity  for the  return  of the
materials to the Client. Al1 materials remaining at the Company six months after
the initial  attempt to contact the Client may be destroyed at the option of the
Company.  The Client agrees to keep the Company fully informed of any changes in
circumstances  which would  impede or prevent the Company  from  contacting  the
Client  pursuant  to this  paragraph,  including  but not limited to a change of
address or a change in corporate status for the Client.

Notice
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25.      Any notice  required  to be given by either  party in  accordance  with
these conditions  shall be deemed to be sufficiently  given if sent to the other
party at the address of such party shown on the  quotation by facsimile or telex
and confirmed by prepaid post.

Arbitration
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26.      If any  difference or dispute  shall arise  between the parties  hereto
concerning any matter arising out of the study or any of these conditions,  such
difference  or  dispute  shall be  resolved  in  accordance  with the  expedited
Commercial  Arbitration  Rules of the  American  Arbitration  Association,  by a
single  arbitrator  appointed in accordance with such Rules. The decision of the
arbitrator shall be conclusive and binding upon the parties, and judgment on any
award  rendered  in such  arbitration  may be entered in any court of  competent
jurisdiction.  The  costs of such  arbitration  shall be  borne  equally  by the
parties hereto.

Governing Law
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27.      These  conditions  and any contract  between the Company and the Client
shall be governed  and  construed  in  accordance  with laws of the State of New
Jersey.

Complete Agreement
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28.      This agreement  represents the complete  agreement  between the Company
and the  Client in  relation  to the  performance  of the study.  A1l  preceding
correspondence,  either  written or oral and express or implied  conditions,  or
agreements are hereby expressly  excluded from this contract,  the acceptance of
which is indicated by both parties on execution of this contract.

Severability
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29.      If any provision of these  conditions is determined by an arbitrator or
a court of competent jurisdiction to be illegal or unenforceable, such provision
may be reformed and construed so as to be valid,  operative and  enforceable  to
the maximum  extent  permitted  by law or equity while  preserving  its original
intent. The invalidity or unenforceability of any provisions of these conditions
shall not render  invalid the  remainder  of these  conditions  or any  contract
between the parties.

Non-solicitation of Employees
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30.      The Client  agrees that for a period of one year after the  termination
of this  agreement,  the Client will not solicit or  encourage  employees of the
Company to leave the  employment  of the  Company  for the  purpose of  becoming
employed or otherwise affiliated with the Client.


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