INTERFERON SCIENCES INC
SC 13D/A, 1995-10-25
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE> 1 of 14
                     UNITED STATES             OMB Number:  3235-0145
          SECURITIES AND EXCHANGE COMMISSION   Expires:  October 31, 1997
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                                               per response.....14.90

                        SCHEDULE 13D
                              
          Under the Securities Exchange Act of 1934
                              
                     (Amendment No. 1)*
                              
                  INTERFERON SCIENCES, INC.
                      (Name of Issuer)
            Common Stock, no par value per share
               (Title of Class of Securities)
                              
                         458903101
                       (CUSIP Number)
                              
      Timothy C. Maguire, Esq.; Anne G. Plimpton, Esq.
                 Testa, Hurwitz & Thibeault
                       High Street Tower
                        125 High Street
                    Boston, Massachusetts
                       (617) 248-7000
  (Name, Address and Telephone Number of Person Authorized
           to Receive Notices and Communications)
                       March 29, 1995
   (Date of Event which Requires Filing of this Statement)
                              
If the filing person has previously filed a statement on
Schedule 13G to report the acquisition which is the subject
of this Schedule 13D, and is filing this schedule because of
Rule 13d-1(b)(3) or (4), check the following box ___.

Check the following box if a fee is being paid with the
statement ___.  (A fee is not required only if the reporting
person:  (1) has a previous statement on file reporting
beneficial ownership of more than five percent of the class
of securities described in Item 1; and (2) has filed no
amendment subsequent thereto reporting beneficial ownership
of five percent or less of such class.)  (See Rule 13d-7.)

Note:  Six copies of this statement, including all exhibits,
should be filed with the Commission.  See Rule 13d-1(a) for
other parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a
reporting person's initial filing on this form with respect
to the subject class of securities, and for any subsequent
amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page
shall not be deemed to be "filed" for the purpose of
Section 18 of the Securities Exchange Act of 1934 ("Act") or
otherwise subject to the liabilities of that section of the
Act but shall be subject to all other provisions of the Act
(however, see the Notes).
<PAGE> 2 of 14
                        SCHEDULE 13D

CUSIP NO. 458903101                     Page 2 of 14 Pages
____________________________________________________________________            
 1   NAME OF REPORTING PERSON  BIOTECHNOLOGY INVESTMENT
     GROUP, L. L. C. ("BIO")
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON  n/a
     
     
____________________________________________________________________     
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) ___
                                                          (b) _X_
____________________________________________________________________     
 3   SEC USE ONLY
     
____________________________________________________________________     
 4   SOURCE OF FUNDS*
     
     AF
____________________________________________________________________
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS         ___
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)
____________________________________________________________________     
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
     
     Delaware
____________________________________________________________________
                7   SOLE VOTING POWER
                    
  NUMBER OF         0
   SHARES     ______________________________________________________
BENEFICIALLY    8   SHARED VOTING POWER
  OWNED BY        
    EACH            2,710,834
  REPORTING   ______________________________________________________
   PERSON       9   SOLE DISPOSITIVE POWER
    WITH         
                    0
              ______________________________________________________
               10   SHARED DISPOSITIVE POWER
                    
                    2,710,834
____________________________________________________________________
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
     2,710,834
____________________________________________________________________
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES   ___
     CERTAIN SHARES*
____________________________________________________________________     
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     
     8.06%
____________________________________________________________________
14   TYPE OF REPORTING PERSON *
     
     00 (Limited Liability Company)
____________________________________________________________________
            *SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
(INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE> 3 of 14
                        SCHEDULE 13D

CUSIP NO. 458903101                     Page 3 of 14 Pages
____________________________________________________________________          
 1   NAME OF REPORTING PERSON  EDWARD BLECH TRUST ("EBT")
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON  n/a
     
     
____________________________________________________________________     
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) ___
                                                          (b) _X_
____________________________________________________________________     
 3   SEC USE ONLY
     
____________________________________________________________________     
 4   SOURCE OF FUNDS*
     
     00
____________________________________________________________________
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS          ___
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)
____________________________________________________________________     
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
     
     New York
____________________________________________________________________
                7   SOLE VOTING POWER
                    
  NUMBER OF         0
   SHARES     ______________________________________________________
BENEFICIALLY    8   SHARED VOTING POWER
  OWNED BY        
    EACH            2,710,834
  REPORTING   ______________________________________________________
   PERSON       9   SOLE DISPOSITIVE POWER
    WITH         
                    0
              ______________________________________________________
               10   SHARED DISPOSITIVE POWER
                    
                    2,710,834
____________________________________________________________________
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
     2,710,834
____________________________________________________________________
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES   ___
     CERTAIN SHARES*
____________________________________________________________________     
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     
     8.06%
____________________________________________________________________
14   TYPE OF REPORTING PERSON *
     
     00
____________________________________________________________________
            *SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
(INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE> 4 of 14
                        SCHEDULE 13D

CUSIP NO. 458903101                     Page 4 of 14 Pages
____________________________________________________________________
 1   NAME OF REPORTING PERSON COLLINSON HOWE VENTURE
     PARTNERS, INC. ("CHVP") (formerly known as Schroder
     Venture Advisers, Inc.) S.S. or I.R.S. IDENTIFICATION
     NO. OF ABOVE PERSON n/a

    
____________________________________________________________________     
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) ___
                                                          (b) _X_
____________________________________________________________________     
 3   SEC USE ONLY
     
____________________________________________________________________     
 4   SOURCE OF FUNDS*
     
     AF
____________________________________________________________________
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS          ___
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)
____________________________________________________________________     
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
     
     Delaware
____________________________________________________________________
                7   SOLE VOTING POWER
                    
  NUMBER OF         0
   SHARES     ______________________________________________________
BENEFICIALLY    8   SHARED VOTING POWER
  OWNED BY        
    EACH            2,710,834
  REPORTING   ______________________________________________________
   PERSON       9   SOLE DISPOSITIVE POWER
    WITH
                    0
              ______________________________________________________
               10   SHARED DISPOSITIVE POWER
                    
                    2,710,834
____________________________________________________________________
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
     2,710,834
____________________________________________________________________
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES   ___
     CERTAIN SHARES*
____________________________________________________________________     
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     
     8.06%
____________________________________________________________________
14   TYPE OF REPORTING PERSON *
     
     CO
____________________________________________________________________
            *SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
(INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE> 5 of 14
                        SCHEDULE 13D

CUSIP NO. 458903101                     Page 5 of 14 Pages
____________________________________________________________________            
 1   NAME OF REPORTING PERSON JEFFREY J. COLLINSON ("JJC")
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON n/a
     
     
____________________________________________________________________     
 2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) ___
                                                          (b) _X_
____________________________________________________________________     
 3   SEC USE ONLY
     
____________________________________________________________________     
 4   SOURCE OF FUNDS*
     
     PF
____________________________________________________________________
 5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS          ___
     REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)
____________________________________________________________________     
 6   CITIZENSHIP OR PLACE OF ORGANIZATION
     
     U.S.A.
____________________________________________________________________
                7   SOLE VOTING POWER
                    
  NUMBER OF         0
   SHARES     ______________________________________________________
BENEFICIALLY    8   SHARED VOTING POWER
  OWNED BY        
    EACH            2,710,834
  REPORTING   ______________________________________________________
   PERSON       9   SOLE DISPOSITIVE POWER
    WITH         
                    0
              ______________________________________________________
               10   SHARED DISPOSITIVE POWER
                    
                    2,710,834
____________________________________________________________________
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     
     2,710,834
____________________________________________________________________
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES   ___
     CERTAIN SHARES*
     
____________________________________________________________________     
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     
     8.06%
____________________________________________________________________
14   TYPE OF REPORTING PERSON *
     
     IN
____________________________________________________________________
            *SEE INSTRUCTIONS BEFORE FILLING OUT!
INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
(INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.
<PAGE> 6 of 14
Item 1.    Security and Issuer:  Common Stock, no par value
           per share of Interferon Sciences, Inc, (the
           "Company").  The address of the Company's principal
           office is 783 New Jersey Avenue, New Brunswick, NJ
           08901.

Item 2.    Identity and Background:

           Regarding Reporting Person Biotechnology Investment Group, L.L.C.:

   I.      a)   Biotechnology Investment Group, L.L.C. ("BIO")

           b)   c/o Collinson Howe Venture Partners, Inc.
                1055 Washington Boulevard
                Stamford, CT  06901

           c)   The sole purpose of the Reporting Person is
                to acquire, hold, protect, manage and dispose of
                equity, debt and derivative securities of
                biotechnology and other companies, and to engage
                in any and all activities necessary, advisable or
                incidental thereto.

           d)   Criminal proceedings -- none

           e)   Civil proceedings -- none

           f)   Place of organization -- Delaware

   II.     The present members of the Reporting Person are:

      1.   Collinson Howe Venture Partners, Inc. ("CHVP")
           (Managing Member) (formerly known as Schroder
           Venture Advisers, Inc.)

           a)   Collinson Howe Venture Partners, Inc.

           b)   1055 Washington Boulevard
                Stamford, CT  06901

           c)   Investment consulting, advisory and
                management services

           d)   Criminal proceedings -- none

           e)   Civil proceedings -- none

           f)   Place of organization -- Delaware

           CHVP is majority-owned and controlled by Jeffrey J.
           Collinson, its President and sole Director.
           Mr. Collinson's business address is the same as
           CHVP's.  There have been no relevant criminal or
           civil proceedings against Mr. Collinson within the
           last five years.  Mr. Collinson is a U.S. citizen.

           Timothy F. Howe is CHVP's Vice President.  Mr. Howe's
           business address is the same as CHVP's.  There have
           been no relevant criminal or civil proceedings
           against Mr. Howe within the last five years.
           Mr. Howe is a U.S. citizen.

      2.   Edward Blech Trust ("EBT")

           a)   Edward Blech Trust
<PAGE> 7 of 14
           b)   418 Avenue I
                Brooklyn, NY 11231

           c)   EBT is a trust created under the laws of New
                York, the lifetime beneficiary of which is Edward
                A. Blech, a minor.

           d)   Criminal proceedings -- none

           e)   Civil proceedings -- none

           f)   Place of organization -- New York

           The sole trustee of EBT is Mordechai Jofen.
           Mr. Jofen's address is the same as EBT's.  Mr. Jofen
           is a teacher.  There have been no relevant criminal
           or civil proceedings against Mr. Jofen within the
           past five years.  Mr. Jofen is a U.S. citizen.

      3.   Wilmington Trust Company ("WTC"), as voting trustee
           under the Company Voting Trust Agreement, dated as of
           January 19, 1995 (the "Company Voting Trust
           Agreement"), among WTC, BIO and BIO Holding, L.L.C.
           ("Holdings").  Each of Citibank, N.A. (the "Bank")
           and Holdings, respectively, pursuant to the Company
           Voting Trust Agreement, has the right to direct
           certain actions of WTC as a member of BIO.  WTC, as
           the member holding a majority interest in Holdings,
           has the right to direct the actions of Holdings under
           the Company Voting Trust Agreement.  The Bank,
           pursuant to the Holdings Voting Trust Agreement,
           dated as of January 19, 1995, among WTC, David Blech
           and Holdings, has the right to direct the actions of
           WTC as a member of Holdings with respect to the
           rights of Holdings under the Company Voting Trust
           Agreement.

           a)   Wilmington Trust Company, as Voting Trustee

           b)   1100 N. Market Street
                Rodney Square North
                Wilmington, DE 19890
                Attention: Corporate Trust Administration

           c)   Banking, trust and other financial services

           d)   Criminal proceedings -- none

           e)   Civil proceedings -- none

           f)   Place of organization -- Delaware


           Regarding Reporting Person Edward Blech Trust:

               See II.2., above.

           Regarding Reporting Person CHVP:

               See II.1., above.

           Regarding Reporting Person Jeffrey J. Collinson:

               See II.1., above.
<PAGE> 8 of 14
Item 3.    Source and Amount of Funds or Other Consideration:

           The Reporting Persons EBT and CHVP each contributed
           certain property, in the form of cash or securities,
           to the Reporting Person BIO in exchange for a
           proportionate interest in the assets of BIO.  On the
           basis of the agreed upon value of all contributed
           securities and cash, the following Reporting Persons
           are considered to have paid the following
           consideration for their respective pro-rata interests
           in the securities of the issuer acquired on
           January 27, 1995 as assets of BIO:

           EBT (for 35.6%) various securities valued at $950,048.92

           CHVP (for 1%) $26,650.00 in cash

           Subsequently, Reporting Person BIO converted the
           Issuer's Promissory Note in the principal amount of
           $220,000 for 183,334 shares on August 14, 1995.

Item 4.    Purpose of Transaction:  All shares reported as
           being beneficially owned by any and all of the
           Reporting Persons are held for investment purposes.
           No Reporting Person has any present plan or proposal
           or purpose to effect substantial changes in the
           business, organization, form or control of the
           Company.

Item 5.    Interest in Securities of the Issuer:  (Note:
           Item 5 of the Schedule 13D originally filed by the
           Reporting Persons is amended to read in its entirety
           as follows):

           By virtue of their status as members of BIO, each of
           CHVP and EBT may be deemed the beneficial owner of
           all shares held of record by BIO, over which they have 
           shared voting and investment power (the "BIO Shares").

           By virtue of his status as the majority owner and
           controlling person of CHVP, Jeffrey J. Collinson
           ("JJC") may also be deemed the beneficial owner of
           the BIO Shares.

           The number of shares reported herein by all Reporting
           Persons represents a net 1,126,666 fewer shares than
           were reported by the Reporting Persons on their
           original Schedule 13D.  The new total reflects
           (i) the cashless conversion on March 29, 1995, of
           Warrants covering 1,637,500 shares for a total of
           327,500 shares and (ii) the purchase on August 14,
           1995 of 183,334 shares issued to BIO upon the
           conversion of the Issuer's promissory note in the
           principal amount of $220,000.  As a result, the
           following Reporting Persons may be deemed to be the
           beneficial owners of the following shares, with
           shared or sole voting and dispositive powers as
           indicated.  Such shares representing 12.04% of their
           class of security on the basis of 33,643,000 shares
           outstanding as of 8/14/95:

              BIO           2,710,834    All powers shared
              EBT           2,710,834    All powers shared
              CHVP          2,710,834    All powers shared
              JJC           2,710,834    All powers shared
   
           Each of the Reporting Persons disclaims beneficial
           ownership of any shares except to the extent, if any,
           of such Reporting Person's actual pecuniary interest
           therein.

Item 6.    Contracts, Arrangements, Understandings or Relationships with 
           Respect to Securities of the Issuer.

      I.   Limited Liability Company Agreement of Biotechnology Investment 
           Group, L.L.C.

           Securities of the issuer are held by Biotechnology
           Investment Group, L.L.C. ("BIO"), one of the
           Reporting Persons who are signatories to this
           Schedule.  CHVP is the Managing Member of 
<PAGE> 9 of 14
           BIO.  The Edward Blech Trust ("EBT") and The 
           Wilmington Trust Company, as voting trustee under a voting 
           trust dated as of January 19, 1995 ("WTC") are the other 
           members of BIO.
      
           Pursuant to the Limited Liability Company Agreement
           of BIO, dated as of January 19, 1995 (the "LLC
           Agreement") the following terms and conditions apply
           with respect to the securities of the Issuer.  The
           following is a summary of certain provisions
           contained in the LLC Agreement, which is incorporated
           herein by reference and attached hereto as Exhibit 1.
           Section references are to the relevant section of the
           LLC Agreement.
      
           A. General.  Pursuant to the LLC Agreement, the
              management of BIO is vested in CHVP, as Managing
              Member (Section 6.1), subject to restrictions on its
              powers as Managing Member (Section 6.3) and on the
              general powers of BIO (Section 3.3).  As used in the LLC
              Agreement and as pertinent to the descriptions set
              forth herein, the term "Required Vote" means the
              vote or written consent or approval of WTC and
              EBT, unless EBT fails to give its consent,
              approval or affirmative vote after due notice, in
              which case the term "Required Vote" means the vote
              or written consent or approval of WTC and CHVP.
              (Section 1.1).
      
           B. Voting of the Issuer's Securities.  Pursuant to
              the LLC Agreement, any exercise of voting rights
              with respect to the Issuer's securities requires
              the prior written consent of the Members acting by
              Required Vote, except for votes on matters which
              in CHVP's reasonable opinion, would not be adverse
              to BIO (with votes on mergers, consolidations, or
              sales of all or substantially all assets of the
              Issuer being considered adverse to BIO), and
              except for votes required on an expedited basis
              such that CHVP would not have the opportunity to
              solicit the approval of the Members.  With respect
              to each such exception, CHVP is empowered to
              exercise voting rights with respect to the
              Issuer's securities. (Section 3.3(ii)(l)).
      
           C. Dispositions.  Dispositions of the Issuer's
              securities are governed by the LLC Agreement as
              follows:
      
              i)   Securities of the Issuer may be disposed of
                   pursuant to a merger or consolidation of the
                   Issuer for cash or securities;
          
              ii)  All or any portion of the securities of the
                   Issuer may be disposed of, at the direction
                   of CHVP as Managing Member, for cash without
                   further consent of the members if the
                   Managing Member certifies to the Members that
                   all or substantially all cash proceeds from
                   such sale are to be used to pay principal,
                   interest or fees payable to Citibank, N.A.
                   (the "Bank") pursuant to a Credit Agreement
                   dated as of January 19, 1995 (the "Credit
                   Agreement") between BIO and the Bank, which
                   Credit Agreement is further described below;
          
              iii) All or any portion of the securities of the
                   Issuer may be disposed of, at the direction
                   of CHVP as Managing Member, for cash at a
                   price that equals or exceeds minimum cash
                   prices established from time to time by
                   recommendation of CHVP and approved by WTC
                   and EBT; and
          
              iv)  All or any portion of the securities of the
                   Issuer may be disposed of, at the direction
                   of CHVP as Managing Member, for cash, at
                   prices which do not meet the minimum cash
                   prices described in iii) above, only with the
                   written consent of both WTC and EBT;
                   provided, however, that
          
                   (A)  if WTC has consented to any such sale of
                        the Issuer's securities and EBT has not
                        so consented, CHVP, as Managing Member,
                        shall cause the distribution in kind to
                        EBT of EBT's pro rata portion of the
                        Issuer's 
<PAGE> 10 of 14
                        securities proposed to be sold,
                        and shall sell for cash WTC's pro rata
                        portion of the Issuer's securities to be
                        sold; and
               
                   (B)  if EBT has consented to such sale and
                        WTC has not so consented, CHVP, as
                        Managing Member, shall, upon the
                        election of EBT, distribute in kind or
                        sell for cash EBT's pro rata portion of
                        the Issuer's securities and shall take
                        no action with respect to WTC's pro rata
                        portion of the Issuer's securities
                        proposed to be sold. (Section 3.3(iv)).

           D. Derivative Securities.  Under the LLC Agreement,
              BIO has no power or authority to transfer or
              dispose of any put or call or other similar
              arrangement with respect to the Issuer's
              securities without the consent of WTC and EBT.
              (Section 3.3(iv)).
      
           E. Division of Profits and Losses.  Pursuant to the
              LLC Agreement, profits and losses are generally
              allocated among the Members, including the
              Managing Member, in accordance with their
              respective percentage ownership interests.  
              (Sections 8.1-8.7)  Distributions to the Members 
              generally follow the percentage interests, with provision
              for special distributions to CHVP depending on the 
              aggregate amount of distributions made to WTC and
              EBT, as set forth in the LLC Agreement.  
              (Sections 9.1-9.4)

 II.       Credit Agreement and Pledge Agreement with Citibank, N.A.

           The securities of the Issuer have been pledged to the
           Bank by BIO pursuant to a Pledge Agreement dated as
           of January 19, 1995 (the "Pledge Agreement") in order
           to secure certain obligations of BIO to the Bank
           pursuant to the Credit Agreement (previously defined)
           and certain promissory notes (the "Notes") delivered
           pursuant to the Credit Agreement.  The following is a
           summary of certain provisions contained in the Credit
           Agreement and the Pledge Agreement, which are
           incorporated herein by reference and attached hereto
           as Exhibits 2 and 3, respectively.  Pursuant to the
           Credit Agreement, the Bank has extended a credit
           facility of up to $3,000,000 to BIO on terms and
           conditions contained therein.  All assets of BIO,
           including all securities of the Issuer held by BIO,
           have been pledged to the Bank to secure indebtedness
           outstanding under the Credit Agreement.  The Loan
           Agreement and the Credit Agreement provide for
           standard default and similar provisions which, if
           triggered, would limit the power of BIO to dispose of
           securities of the Issuer without the Bank's consent
           and would cause a transfer of voting and investment
           power if the Bank's remedies on default were
           exercised under the Pledge Agreement.

Item 7.    Material to be Filed as Exhibits.

           *Exhibit 1.  Biotechnology Investment Group, L.L.C. Limited
                        Liability Company Agreement

           *Exhibit 2.  Company Credit Agreement

           *Exhibit 3.  Company Pledge Agreement

            Exhibit 4.  Agreement
      
            Exhibit 5.  Power of Attorney

____________________________
*  Previously filed as a paper exhibit with the original 13D Statement and
need not be refiled pursuant to Item 101(a)(2)(ii) of Regulation S-T.      
<PAGE> 11 of 14
                        SCHEDULE 13D

CUSIP NO. 458903101                     Page 11 of 14 Pages
                                        


Signature

     After reasonable inquiry and to the best of my knowledge and belief, 
I certify that the information set forth in this statement is true, 
complete and correct.



  October 25, 1995
       Date
                              BIOTECHNOLOGY INVESTMENT GROUP, L.L.C.
                              By: COLLINSON HOWE VENTURE PARTNERS, INC.        
                                  (formerly known as Schroder Venture 
                                   Advisers, Inc.)
                              Its: Managing Member



                              By:___________________*___________________
                                 Jeffrey J. Collinson, President


                              EDWARD BLECH TRUST



                              By:___________________*___________________
                                 Mordechai Jofen, as Sole Trustee


                              COLLINSON HOWE VENTURE PARTNERS, INC.



                              By:___________________*___________________
                                 Jeffrey J. Collinson, President



                              * By:     /s/ Timothy C. Maguire
                                   Timothy C. Maguire, Attorney-in-Fact

_____________________
*  This statement is filed pursuant to an Agreement by and among
the Reporting Persons, a copy of which is attached hereto; this
statement is signed pursuant to a Power of Attorney, incorporated
herein by reference, the original of which was filed with the
original Schedule 13D by the Reporting Persons and a copy of which is
also attached hereto.


<PAGE> 12 of 14
                            AGREEMENT
                     Dated February 8, 1995
                                
     Pursuant to Rule 13d-1(f)(1) under the Securities Exchange
Act of 1934, the undersigned hereby agree that only one statement
containing the information required by Schedule 13D, or any
amendment thereto, need be filed with respect to the current
ownership of any of the undersigned of shares of Common Stock of
Interferon Sciences, Inc. or any purchases of additional stock of 
such Company by any of the undersigned.

                            BIOTECHNOLOGY INVESTMENT GROUP, L.L.C.
                            By: SCHRODER VENTURE ADVISERS, INC.
                            Its: Managing Member


                            By: /s/ Jeffrey J. Collinson
                                  Jeffrey J. Collinson,
                                  President


                            EDWARD BLECH TRUST

                            By: /s/ Mordechai Jofen
                                  Mordechai Jofen,
                                  as Sole Trustee


                            SCHRODER VENTURE ADVISERS, INC.

                            By: /s/ Jeffrey J. Collinson
                                 Jeffrey J. Collinson,
                                 President


                            /s/ Jeffrey J. Collinson
                            Jeffrey J. Collinson



<PAGE> 13 of 14
                      POWER OF ATTORNEY


   KNOW ALL MEN BY THESE PRESENTS, that each person whose
signature appears below, and each entity for which an
authorized signature appears below, hereby constitutes and
appoints Timothy C. Maguire and Anne G. Plimpton, and each
of them, each with full power to act without the other, his,
her or its, as the case may be, true and lawful attorney-in-
fact, with full power of substitution, to sign any and all
instruments, certificates and documents that may be
necessary, desirable or appropriate to be executed on behalf
of himself, herself or itself, as the case may be, as an
individual or in his, her or its, as the case may be,
capacity as a general partner of any partnership or a
trustee of any trust, pursuant to section 13 or 16 of the
Securities Exchange Act of 1934, as amended (the "Exchange
Act"), and any and all regulations promulgated thereunder,
and to file the same, with all exhibits thereto, and any
other documents in connection therewith, all in connection
with the beneficial ownership of securities held by
Biotechnology Investment Group, L.L.C., with the Securities
and Exchange Commission, and with any other entity when and
if such is mandated by the Exchange Act or by the By-laws of
the National Association of Securities Dealers, Inc.,
granting unto said attorney-in-fact full power and authority
to do and perform each and every act and thing necessary,
desirable or appropriate, fully to all intents and purposes
as he might or could do in person, thereby ratifying and
confirming all that said attorney-in-fact, or his
substitutes, may lawfully do or cause to be done by virtue
hereof.  This Power of Attorney will remain in effect until
revoked by an instrument in writing delivered to the
aforesaid attorney(s)-in-fact.  The undersigned each
acknowledge that Timothy C. Maguire and Anne G. Plimpton are
not assuming any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act of
1934.

   IN WITNESS WHEREOF, this Power of Attorney has been
signed as of the 1st day of February, 1994.


                            BIOTECHNOLOGY INVESTMENT GROUP, L.L.C.
                            By: SCHRODER VENTURE ADVISERS, INC.
                            Its: Managing Member


                            By: /s/ Jeffrey J. Collinson
                                Jeffrey J. Collinson,
                                President


                            EDWARD BLECH TRUST

                            By: /s/ Mordechai Jofen
                                  Mordechai Jofen,
                                  as Sole Trustee


                            /s/ Mordechai Jofen
                            Mordechai Jofen, as Sole Trustee

<PAGE> 14 of 14
                            SCHRODER VENTURE ADVISERS, INC.

                            By: /s/ Jeffrey J. Collinson
                                 Jeffrey J. Collinson,
                                 President


                            /s/ Jeffrey J. Collinson
                            Jeffrey J. Collinson


                            SCHRODERS INCORPORATED

                            By:/s/ Jeffrey J. Collinson
                                  Jeffrey J. Collinson
                                  Its Attorney-in-Fact


                            SCHRODER VENTURES LIMITED PARTNERSHIP
                            By: SCHRODER VENTURES MANAGEMENT L.P.
                            Its: General Partner
                            By: SCHRODER VENTURE MANAGERS INC.
                            Its: General Partner

                            By: /s/ Jeffrey J. Collinson
                                 Jeffrey J. Collinson,
                                 Its Attorney-in-Fact


                            SCHRODER VENTURES U.S. TRUST
                            By: SCHRODER VENTURE MANAGERS LIMITED
                            Its: Manager

                            By: /s/ Jeffrey J. Collinson
                                  Jeffrey J. Collinson
                                  Its Attorney-in-Fact






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