AUTOIMMUNE INC
SC 13G/A, 1999-12-22
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                 SCHEDULE 13G
                                (RULE 13d-102)

           INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
          TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
                              PURSUANT TO 13d-2(b)

                              (Amendment No. 1)(1)


                                AUTOIMMUNE INC.
                                ----------------
                                (Name of Issuer)

                                  COMMON STOCK
                          -----------------------------
                          (Title of Class of Securities)

                                   052776 10 1
                                 --------------
                                 (CUSIP Number)

                               DECEMBER 16, 1999
            -------------------------------------------------------
            (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

       / /   Rule 13d-1(b)
       /X/   Rule 13d-1(c)
       / /   Rule 13d-1(d)




- ---------------------------

(1)   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 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 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>

CUSIP NO. 052776 10 1                 13G                PAGE 2 OF 7 PAGES

- -------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS:
     BIOTECHNOLOGY VALUE FUND, L.P.
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY):
- -------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER
     OF A GROUP*                                          (a)  /X/     (b)  / /
- -------------------------------------------------------------------------------
 (3) SEC USE ONLY

- -------------------------------------------------------------------------------
 (4) CITIZENSHIP OR PLACE OF ORGANIZATION
     DELAWARE
- -------------------------------------------------------------------------------
    NUMBER                    (5) SOLE VOTING POWER
      OF                           0
    SHARES                   --------------------------------------------------
 BENEFICIALLY                 (6) SHARED VOTING POWER
   OWNED BY                         1,159,625
     EACH                    --------------------------------------------------
  REPORTING                   (7) SOLE DISPOSITIVE POWER
   PERSON                           0
    WITH                     --------------------------------------------------
                              (8) SHARED DISPOSITIVE POWER
                                    1,159,625
- -------------------------------------------------------------------------------
 (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     1,159,625
- -------------------------------------------------------------------------------
(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
     CERTAIN SHARES*                                                     / /
- -------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
     7.0%
- -------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
     PN
- -------------------------------------------------------------------------------

              *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP NO. 052776 10 1                 13G                PAGE 3 OF 7 PAGES

- -------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS:
     BVF PARTNERS L.P.
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY):
- -------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER
     OF A GROUP*                                          (a)  /X/     (b)  / /
- -------------------------------------------------------------------------------
 (3) SEC USE ONLY

- -------------------------------------------------------------------------------
 (4) CITIZENSHIP OR PLACE OF ORGANIZATION
     DELAWARE
- -------------------------------------------------------------------------------
    NUMBER                    (5) SOLE VOTING POWER
      OF                           0
    SHARES                   --------------------------------------------------
 BENEFICIALLY                 (6) SHARED VOTING POWER
   OWNED BY                         1,919,100
     EACH                    --------------------------------------------------
  REPORTING                   (7) SOLE DISPOSITIVE POWER
   PERSON                           0
    WITH                     --------------------------------------------------
                              (8) SHARED DISPOSITIVE POWER
                                    1,919,100
- -------------------------------------------------------------------------------
 (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     1,919,100
- -------------------------------------------------------------------------------
(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
     CERTAIN SHARES*                                                     / /
- -------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
     11.5%
- -------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
     PN
- -------------------------------------------------------------------------------

              *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP NO. 052776 10 1                 13G                PAGE 4 OF 7 PAGES

- -------------------------------------------------------------------------------
 (1) NAMES OF REPORTING PERSONS:
     BVF INC.
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY):
- -------------------------------------------------------------------------------
 (2) CHECK THE APPROPRIATE BOX IF A MEMBER
     OF A GROUP*                                          (a)  /X/     (b)  / /
- -------------------------------------------------------------------------------
 (3) SEC USE ONLY

- -------------------------------------------------------------------------------
 (4) CITIZENSHIP OR PLACE OF ORGANIZATION
     DELAWARE
- -------------------------------------------------------------------------------
    NUMBER                    (5) SOLE VOTING POWER
      OF                           0
    SHARES                   --------------------------------------------------
 BENEFICIALLY                 (6) SHARED VOTING POWER
   OWNED BY                         1,919,100
     EACH                    --------------------------------------------------
  REPORTING                   (7) SOLE DISPOSITIVE POWER
   PERSON                           0
    WITH                     --------------------------------------------------
                              (8) SHARED DISPOSITIVE POWER
                                    1,919,100
- -------------------------------------------------------------------------------
 (9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     1,919,100
- -------------------------------------------------------------------------------
(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
     CERTAIN SHARES*                                                     / /
- -------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
     11.5%
- -------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
     IA, CO
- -------------------------------------------------------------------------------

              *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>

CUSIP NO. 052776 10 1                 13G                PAGE 5 OF 7 PAGES

ITEM 1(a).   NAME OF ISSUER:

             Autoimmune, Inc. ("Autoimmune")

ITEM 1(b).   ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

             128 Spring Street
             Lexington, Massachusetts 02173

ITEM 2(a).   NAME OF PERSON FILING:

             This schedule is being filed on behalf of the following persons*:

             (i)    Biotechnology Value Fund, L.P. ("BVF")
             (ii)   BVF Patners L.P. ("Partners")
             (iii)  BVF Inc. ("BVF Inc.")

             *      Attached as Exhibit A is a copy of an agreement among the
                    persons filing (as specified hereinabove) that this
                    Schedule 13G is being filed on behalf of each of them.


ITEM 2(b).   ADDRESS OF PRINCIPAL BUSINESS OFFICE:

             The principal business office of the persons comprising the
group filing this Schedule 13G is located at 227 West Monroe Street, Suite
4800, Chicago, Illinois, 60606.

ITEM 2(c).   CITIZENSHIP:

             BVF:                          a Delaware limited partnership
             Partners:                     a Delaware limited partnership
             BVF Inc.:                     a Delaware corporation

ITEM 2(d).   TITLE OF CLASS OF SECURITIES:

             Common Stock.

ITEM 2(e).   CUSIP NUMBER:

             052776 10 1

ITEM 3.      IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(c), CHECK
             THIS BOX:  /X/

<PAGE>

CUSIP NO. 052776 10 1                 13G                PAGE 7 OF 7 PAGES

ITEM 4.      OWNERSHIP:

             The information in items 1 and 5 through 11 on the cover pages
(pp.2-5) on Schedule 13G is hereby incorporated by reference.

ITEM 5.      OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

             If this statement is being filed to report the fact that as of
the date hereof the reporting person has ceased to be the beneficial owner of
more than five percent of the class of securities check the following.  / /

ITEM 6.      OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

             BVF shares voting and dispositive power over the shares of the
common stock it beneficially owns with Partners. Partners and BVF Inc. share
voting and dispositive power over the shares of the common stock they
beneficially own with, in addition to BVF, certain managed accounts on whose
behalf Partners, as investment manager, purchased such shares. None of the
managed accounts individually owns more than 5% of the common stock of
Autoimmune.

ITEM 7.      IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
             ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
             COMPANY:

             Not applicable.

ITEM 8.      IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF A GROUP:

             Not applicable.

ITEM 9.      NOTICE OF DISSOLUTION OF GROUP:

             Not applicable.

<PAGE>

CUSIP NO. 052776 10 1                 13G                PAGE 7 OF 7 PAGES

ITEM 10.    CERTIFICATION

            By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held
for the purpose of or with the effect of changing or influencing the control
of the issuer of the securities and were not acquired and are not held in
connection with or as a participant in any transaction having that purpose or
effect.

            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.

Dated: December 22, 1999


            BIOTECHNOLOGY VALUE FUND, L.P.

            By:   BVF Partners L.P., its general partner

                  By:   BVF Inc., its general partner


                        By:  /s/ Mark N. Lampert
                             ----------------------------
                             Mark N. Lampert
                             President


            BVF PARTNERS L.P.

            By:   BVF Inc., its general partner

                        By:  /s/ Mark N. Lampert
                             ----------------------------
                             Mark N. Lampert
                             President


            BVF INC.

            By:  /s/ Mark N. Lampert
                 ----------------------
                 Mark N. Lampert
                 President


<PAGE>

                                  EXHIBIT A


                      AGREEMENT REGARDING JOINT FILING


    The undersigned, Biotechnology Value Fund, L.P., a Delaware limited
partnership, and BVF Partners L.P., a Delaware limited Partnership, and BVF
Inc., a Delaware corporation, hereby agree and acknowledge that the
information required by Schedule 13G, to which this Agreement is attached as
an exhibit, is filed on behalf of each of them. The undersigned further agree
that any amendments or supplements thereto shall also be filed on behalf of
each of them.


Dated: December 22, 1999



            BIOTECHNOLOGY VALUE FUND, L.P.

            By:   BVF Partners L.P., its general partner

                  By:   BVF Inc., its general partner


                        By:  /s/ Mark N. Lampert
                             -------------------------
                             Mark N. Lampert
                             President


            BVF PARTNERS L.P.

            By:   BVF Inc., its general partner

                        By:  /s/ Mark N. Lampert
                             ------------------------
                             Mark N. Lampert
                             President


            BVF INC.

            By:  /s/ Mark N. Lampert
                 ------------------------
                 Mark N. Lampert
                 President




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