EXHIBIT 10.6



                                    AGREEMENT


       WHEREAS,  Ajinomoto Co., Inc.  ("Ajinomoto")  of Tokyo,  Japan desires to
sponsor  and fund a research  and  development  program and BTRL  Contracts  and
Services,  Inc., doing business as Biotech Research Laboratories (BTRL) a wholly
owned  subsidiary  company of Boston  Biomedica,  Inc.,  desires to provide  the
necessary  services  to perform  such  research  (The  Project),  this  Contract
Agreement  is made  this 1st day of  October  1995 by  Ajinomoto  and  BTRL.  In
consideration of the mutual promises set forth herein,  the parties hereto state
and agree as follows:

1.     BTRL agrees,  that in return for the payments to be made  thereunder,  it
       shall  provide  services   including   labor,   materials  and  supplies,
       facilities and administrative support necessary to perform the Project as
       described in Attachment I, using its best efforts therein. This work will
       be performed under the direction of the Project  Officer  (Ajinomoto) and
       facilitated by a Principal Investigator (BTRL).

2.     In  consideration  of the  services  to be  performed  by BTRL during the
       Project,  Ajinomoto will pay BTRL in accordance with the budget specified
       in Attachment II.

       a.     The Labor,  Materials  and Supplies and Other Direct  Charges will
              reflect  the actual  usage on the  Contract,  and will be burdened
              with a [Language Deleted Due To Confidential  Treatment  Request.]
              Fringe  Benefit  Rate,  an [Language  Deleted Due To  Confidential
              Treatment  Request.]  G&A  Rate  and a  [Language  Deleted  Due To
              Confidential Treatment Request.] Fee as indicated. Fringe benefits
              will include: long-term disability,  life insurance,  earned time,
              tuition  reimbursement,  usually ten paid holidays,  401K plan and
              short  term  disability.  No  health  insurance  coverage  will be
              offered to this class of employee ( "Project At-Will").

       b.     The Rental and Other Fixed Overhead Costs will remain fixed in the
              course of the Project as indicated.

       c.     Any required equipment  purchases which are not billed directly to
              this contract,  but which come from a Supplementary  Budget,  will
              not be burdened with G&A or Fee.

       The  payments  on each  year's  budget  shall  be  payable  in two  equal
       semi-annual  installments,  the  first  of  which  shall be due as of the
       effective  date of this Agreement and the remaining  installments  due at
       six month intervals thereafter.  BTRL will provide Ajinomoto with monthly
       statements indicating the actual expenditures incurred on this Project.

       In the  event  that  substantial  changes  in  the  proposed  budget  are
       requested by Ajinomoto, (such as hiring additional personnel or requiring
       substantial  increases in the cost of Materials  or  Services),  and such
       changes will exceed the proposed 

                                    -Page 1-


       budget for the year, BTRL will request a  Supplementary  Budget and await
       Ajinomoto's  approval prior to incurring these costs.  Approved  payments
       relating to the Supplementary  Budget will be made in accordance with the
       manner detailed in a., b., c., above.

3.     BTRL agrees that in the performance of the Project,  it shall provide the
       personnel identified and required by Ajinomoto. Initially, this personnel
       shall consist of a Principal  Investigator  (10%  effort),  two full-time
       Technicians and one full-time  Administrative  Assistant. If requested by
       Ajinomoto,  a full-time  Senior Scientist or other personnel may be added
       at a subsequent time. Personnel hired by BTRL for the Project, other than
       the P.I., will be "Project At-Will" employees directly  reimbursed by the
       Project.  The scientific  personnel working on the Project shall have the
       necessary scientific training and experience to perform the Project.

4.     In further consideration of the payments to be made in Paragraph 2 above,
       BTRL shall provide two carpeted  offices  (designated as Room I and Ia on
       BTRL's  floor  plan),  one  for  [Language  Deleted  Due To  Confidential
       Treatment  Request.],  the on-site Project Officer employed by Ajinomoto,
       and another for the  Administrative  Assistant and scientific  personnel.
       The offices will come equipped with a telephone  extension  connecting to
       the Company switchboard for internal and local use and a computer network
       connection.  Private telephone line(s) will be provided by the Project as
       will any additional office  improvements.  BTRL also agrees to provide to
       the Project, laboratory space designated as Laboratory X and Xa on BTRL's
       floor plan.  Laboratory Xa comes  equipped with  laboratory  casework and
       cabinets. Laboratory X does not come equipped with laboratory casework or
       cabinets.  Any additional  casework , cabinets or laboratory  renovations
       will be provided by the Project.

5.     Ajinomoto  agrees and shall  require  the  Project  Officer and any other
       Ajinomoto  representative  entering  BTRL's  premises  to  agree  to  the
       following:

       a.     The  presence  of such  person(s)  in BTRL's  premises  is for the
              benefit of Ajinomoto and though BTRL will use  reasonable  efforts
              to maintain  its premises in a safe  condition,  BTRL shall not be
              liable for any illness or injury  suffered by such person(s) while
              in, on or around BTRL's premises, including its laboratories where
              infectious biological materials are or may be used.

       b.     In the event of any illness or injury to such person(s)  occurring
              on, in or around BTRL's premises,  BTRL shall be released from any
              and all  responsibility  or  liability  for such illness or injury
              except to the extent such  illness or injury  occurred as a result
              of any intentional misconduct by BTRL. Ajinomoto shall defend BTRL
              against any such claims by such  persons and  indemnify  BTRL from
              any liability arising from such claims.

                                    -Page 2-


       c.     Ajinomoto  shall have the  responsibility  of providing  statutory
              workers  compensation  insurance and any other insurance  coverage
              that may apply to such person(s).

       d.     BTRL shall have no obligation  to provide any  insurance  coverage
              whatsoever for the benefit of Ajinomoto or such person(s).

       e.     Such  person(s)  shall abide by all BTRL policies and  procedures,
              including those concerning  health,  security and safety,  and any
              violation of such  policies and  procedures  shall entitle BTRL to
              refuse to allow such  person(s) on its premises  and/or to require
              Ajinomoto  to  substitute  other  representatives  for  those  who
              violate such policies and procedures.

       f.     Any  non-public  information  learned  about  any  aspect  of  the
              business  of BTRL  and/or its  affiliated  companies  (other  than
              information  concerning  the  Project)  shall  be held in full and
              complete  confidence  and shall not be used,  or  disclosed to any
              person or entity whatsoever,  without the prior written consent of
              BTRL.   The  foregoing   restriction   shall  apply  to  technical
              information, and financial and non-financial information including
              but  not  limited  to  know-how,   formulae,  patents,  processes,
              procedures,  sales  information,  manufacturing  data and names of
              customers or vendors.

6.     This  Agreement and the Project shall extend for an initial term of three
       (3) years, which may be extended by mutual agreement for additional terms
       of one year each.

       Ajinomoto  shall  have the right to  terminate  this  Agreement  prior to
       September  30, 1998 by giving  three (3) months prior  written  notice to
       BTRL. If however,  Ajinomoto  terminates this Agreement without cause for
       its own convenience BTRL shall be due the balance of all Fee as specified
       in the Project Budget (Attachment II). Except as otherwise provided above
       or unless explicitly agreed otherwise between the parties,  neither party
       shall have the right to terminate this Agreement on or before October 30,
       1998, except that either party may terminate this Agreement forthwith:

       a.     in the event the other party shall  breach any of its  obligations
              under this  Agreement and fails to remedy such breach within sixty
              (60) days from  receipt of notice of such  breach by the party not
              in default:

       b.     in case of the other party's  liquidation,  bankruptcy or state of
              insolvency; or

       c.     in the event the other party  assigns this  Agreement  without the
              written consent of the terminating party.

       Upon   expiration  or  termination  of  this  agreement  for  any  reason
       whatsoever,  all claims each party may have against the other party shall
       become  due.  The  parties  

                                    -Page 3-


       shall  make up a list of such  claims of each  against  the  other.  Such
       claims  shall be offset  and the net  amount  arrived at shall be settled
       within sixty (60) days from the termination of this agreement.


7.     In order to  protect  the  confidentiality  of all  confidential  subject
       matter,  the parties  agree not to disclose or release such  confidential
       subject  matter to any person,  laboratory,  institution,  corporation or
       other entity that is not directly  participating in this Project; and, to
       not use or permit  the use of said  confidential  subject  matter for any
       purpose other than for the Project  without  first  obtaining the express
       written  permission  of the  other  party,  except  under  the  following
       circumstances:

       a.     Subject  matter that, as of the signing of this  agreement,  is in
              the public domain;

       b.     Subject  matter  that,  as of the  date  of the  signing  of  this
              agreement,  can be shown by written evidence to have been known to
              either party;

       c.     Subject  matter  that,  at any time is  received  in good faith by
              either party from a third party who was lawfully in  possession of
              the same and had the right to disclose the same; and

       d.     Subject  matter  that the  parties  mutually  agree in  writing to
              release from the terms of this agreement.

8.     Any and all discoveries and/or inventions arising from performance of the
       Project shall belong to Ajinomoto.  BTRL shall, however, be entitled to a
       royalty of [Language Deleted Due To Confidential  Treatment  Request.] of
       the net sales of those  products  which are  covered by a product  patent
       arising  out of the  Project;  and BTRL shall be entitled to a royalty of
       [Language  Deleted Due To  Confidential  Treatment  Request.]  of the net
       sales of  products  covered  by only a process  patent  arising  from the
       Project. In the event a product is covered by both a product patent and a
       process patent,  BTRL shall receive a royalty of [Language Deleted Due To
       Confidential Treatment Request.]. Royalty payments on products covered by
       patents shall continue for the life of the applicable patent.  BTRL shall
       be  entitled  to  a  [Language  Deleted  Due  To  Confidential  Treatment
       Request.] royalty on net sales of products utilizing technology developed
       under the  Project  if there is no patent on either  the  product  or the
       process  utilized  therein.  Royalty  payments  applicable  to unpatented
       products or processes  shall  continue for a period of ten years from the
       date of the first  commercial sale of a product  utilizing the unpatented
       technology.

9.     BTRL  shall  have  a  right  of  first   refusal  on  an   exclusive   or
       semi-exclusive  (with Ajinomoto) basis in the event Ajinomoto  decides to
       license any patented technology arising from the Project. BTRL shall have
       the right to use  unpatented  technology in exchange for payment of a sum
       to be agreed upon by both  parties  during the term of its use;  however,
       after ten years of royalty  payments  BTRL shall be deemed to have a paid
       up license to use such technology.

                                    -Page 4-


10.    In the event that  either of the parties  hereto,  at any time during the
       term of this Agreement, commits a breach of any provision thereunder, and
       fails to rectify  such breach  within sixty (60) days from the receipt of
       written  notice  thereof  from the other  party,  such other party may be
       entailed to terminate this Agreement.

11.    In the event of any dispute,  the parties shall use their best efforts to
       resolve such dispute.  If such dispute is not resolved  within sixty (60)
       days of the first  written  notice  thereof,  either  party  may  request
       arbitration, with such arbitration to take place in Rockville,  Maryland,
       in  accordance  with  the  Commercial  Mediation  rules  of the  American
       Arbitration Association.  The parties agree that they will be represented
       at the  oral  proceedings  of such  mediation  by at  least  one of their
       authorized officers who may be assisted by one or more advisors. The cost
       of such mediation shall be shared equally by the parties,  and each party
       shall  bear its own  expenses  in  connection  with such  mediation.  The
       parties  shall  endeavor  and shall  instruct  the  mediator  to have the
       mediation  proceedings completed and a final resolution reached within 60
       days of the date the mediator is appointed.

       This Agreement  shall be governed by and construed in accordance with the
       laws of the State of Maryland.  In the event of an unsettled dispute, the
       parties  mutually  agree to the use of any  federal or state court in the
       State of Maryland  having  jurisdiction  over the subject matter thereof,
       and the parties  hereby  waive any and all rights to object to the laying
       of venue in any such  court and to the right to claim that any such court
       may be an inconvenient forum. The parties hereby submit themselves to the
       jurisdiction of each such court and agree that service of process on them
       in any such action may be effected by notice in writing to the  officials
       or their replacements who have signed this Agreement.

12.    In the event of termination  of or at the end of the Agreement  Ajinomoto
       agrees to reimburse BTRL for those expenses incurred by the Project after
       the  winding  down of the  Project.  Sixty  days  prior to the end of the
       agreement  BTRL will  submit  to the  on-site  Project  Officer a list of
       expenses to be  approved  that will be incurred as a result of the end of
       the project

13.    Attachment I is a description of the Project.

14.    Attachment II is the Project Budget.

15.    Attachment III is the List of Equipment.

16.    Attachment IV is a Building Floor Plan designating  office and laboratory
       space to be assigned to the Project.

                                    -Page 5-


       IN WITNESS  WHEREOF,  the parties hereto have caused this Agreement to be
       executed  as of the  date  set  forth  above  by  their  duly  authorized
       representatives.


AJINOMOTO CO., INC.                 BTRL CONTRACTS  AND SERVICES, INC.


BY                                  BY
  ----------------------------        ------------------------------------------
Masakatsu Nakamura                  Richard T. Schumacher

TITLE                               TITLE
     -------------------------           ---------------------------------------
Managing Director                   President



                                    -Page 6-


                                  ATTACHMENT 1

Research Objectives

       a.     Relationship   between   immunodeficiency  and  plasma  levels  of
              L-cystine

              There  is  evidence  to  support  the  idea  that   persons   with
              immunodeficiencies,  such as Low Natural Killer  Syndrome  (LNKS),
              advanced and terminal stage cancers, HIV-1 infections,  etc., have
              significantly  lower  plasma  levels of  certain  essential  amino
              acids,  i.e.,  L-cystine  and  L-glutamine  compared  to  those of
              healthy individuals.  Since current assays for immunodeficiencies,
              specifically NK activity assays,  require the use of radioisotopes
              and viable biological  samples,  a chemical assay to measure amino
              acids would be both simpler and easier.  Our group is developing a
              colorimetric  assay to determine plasma levels of L-cystine.  This
              assay can be used in place of the more  time-consuming NK activity
              assay to determine a person's  immune status.  The results we have
              obtained  thus far using  this  colorimetric  assay  lend  further
              support to the above hypothesis.

              The ultimate  goal of this project is to develop a diagnostic  kit
              that  makes use of  plasma  levels of  L-cystine  as a marker  for
              immunodeficiency.

       b.     Support  of  clinical  trials  of  Low  NK  Syndrome  patients  by
              treatment with Lentinan.

              The  University of Pittsburgh  School of Medicine,  in cooperation
              with Ajinomoto  Company,  is planning  clinical trials to gain FDA
              approval to administer Lentinan,  a polysaccharide  extracted from
              an edible  Japanese  mushroom,  to patients  with Chronic  Fatigue
              Syndrome  (CFS) with or without LNKS. Use of Lentinan in Japan has
              proven to be an effective  immunopotentiator  for the treatment of
              CFS and LNKS.

       c.     Examination of etiology of Low NK Syndrome

              Our  group  will  also be  collaborating  with the  University  of
              Pittsburgh  School of Medicine to determine  the etiology of LNKS.
              As of now, there are three hypotheses as to the cause of LNKS: (1)
              an undetermined  virus, (2) a defective  metabolic  pathway and/or
              (3) a genetic factor. Once the mechanism(s) that leads to LNKS has
              been defined,  a  quantitative  assay,  e.g., PCR in the case of a
              viral  infection,  can be  utilized  to further  characterize  the
              etiologic agent(s).


ATTACHMENT II
YEARLY COST BREAKDOWN

                            SUMMARY OF ANNUAL COSTS
                               AJINOMOTO CONTRACT

                                                                       3 YEAR
                                           YEAR 1   YEAR 2    YEAR 3    TOTAL
DIRECT LABOR
  Technician         [Language Deleted Due To Confidential Treatment Request.]
  Technician 
  Admin Assistant    [Language Deleted Due To Confidential Treatment Request.]
  P.I.                         

TOTAL DIRECT
LABOR                [Language Deleted Due To Confidential Treatment Request.]

FRINGE BENEFITS                    

FACILITIES                    
OFFICE 272 SQUARE FT.  [Language Deleted Due To Confidential Treatment Request.]
LABS 892 SQUARE FT.

OTHER FIXED OVERHEAD COSTS               

MATERIALS             [Language Deleted Due To Confidential Treatment Request.]

OTHER DIRECT                             
(HEALTH INSURANCE, POSTAGE, TRAVEL, PRIVATE TELEPHONE)

SUBTOTAL                                

G & A               [Language Deleted Due To Confidential Treatment Request.]

TOTAL COSTS                             
                     [Language Deleted Due To Confidential Treatment Request.]
FEE                               

TOTAL COSTS PLUS
FIXED FEE            [Language Deleted Due To Confidential Treatment Request.]

EQUIPMENT

DIRECT LABOR BASED ON 1856 PERON HOURS PER YEAR



                                 ATTACHMENT III

FURNITURE/COMPUTER EQUIPMENT:

Ajinomoto  owns desks,  chairs,  and file cabinets for Dr. Aoki and his staff; 2
IBM compatible computers, 1 laser printer, and 1 laserjet fax.

EQUIPMENT:

Ajinomoto owns the following equipment:

Miscellaneous equipment, supplies, disposable labware, chemicals, etc.
Locker
Scotsman Ice Maker
LKB Ultraspec Plus (Spectrophotometer) 
Perkin Elmer Thermal Cycler (Gene Amp PCR System 9600) 
Sorvall RT6000B Refrigerated Centrifuge 
Ohaus balance 
3x Forma Scientific Water-Jacketed Incubator 
2x Olympus CK2 Microscopes 
Olympus CK2 Microscope with Camera 
Zeiss Axiophot Fluorescence Microscope 
Skatron A/S Plate Washer 
HPLC equipment 
Branson 8200 Sonifier 
Orion Research pH meter 
Sartorius Balance 
Ohaus GT480 Balance 
2x Refrigerator/Freezers 
Beckman 18-70M Ultracentrifuge 
Revco (-70%C) freezer (Deep Freezer) 
Napco 201 and 202 water baths 
Beckman Microfuge 12 
Power Supply 
Fischer Biotech UV Box 
HP Quiet Jet Printer 
Titertek Multiskan Mcc/340 Plate Reader 
Mistral 3000E Centrifuge 
Beckman J2-M1 Centrifuge 
Fire Safety Cabinet
Hoeffer Transfor 
Packard Liquid Scintillation Analyzer 
Branson Sonifier 250 
LKB-HPLC Variable Monitor 
LKB-HPLC Superac 
LKB-HPLC LC Controller 
LKB-HPLC HPLC Pump



                                 Attachment IV

                          [FLOOR PLAN -- UPPER LEVEL]



                                 Attachment IV

                          [FLOOR PLAN -- LOWER LEVEL]