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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                 (RULE 13D-102)

                 INFORMATION TO BE INCLUDED IN STATEMENTS FILED
          PURSUANT TO RULE 13D-1(B), (C) AND (D) AND AMENDMENTS THERETO
                         FILED PURSUANT TO RULE 13D-2(B)

                              (AMENDMENT NO. ____)*
                            La Jolla Pharmaceuticals
--------------------------------------------------------------------------------
                                (Name of Issuer)
                          Common Stock, $0.01 par value
--------------------------------------------------------------------------------
                         (Title of Class of Securities)
                                    503459109
      ---------------------------------------------------------------------
                                 (CUSIP Number)
                                February 9, 2001
--------------------------------------------------------------------------------
             (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)

         * 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 in 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).



POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION  CONTAINED
IN THIS FORM ARE NOT  REQUIRED TO RESPOND  UNLESS THE FORM  DISPLAYS A CURRENTLY
VALID OMB CONTROL NUMBER.


SEC 1745 (3-98)                Page 1 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


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

 1. Names of Reporting Persons.
    I.R.S. Identification Nos. of above persons (entities only).

    J.P. Morgan Partners (BHCA), L.P. (formerly known as Chase Equity
    Associates, L.P.)
    13-3371826
--------------------------------------------------------------------------------

 2. Check the Appropriate Box if a Member of a Group (See Instructions)


   (a) .........................................................................

   (b) .........................................................................

--------------------------------------------------------------------------------
 3. SEC Use Only ...............................................................
--------------------------------------------------------------------------------
 4. Citizenship or Place of Organization    Delaware
--------------------------------------------------------------------------------
  Number of Shares         5.     Sole Voting Power           2,055,000
  Beneficially Owned     -------------------------------------------------------
  by Each Reporting        6.     Shared Voting Power...........................
  Person With:           -------------------------------------------------------
                           7.     Sole Dispositive Power      2,055,000
                         -------------------------------------------------------
                           8.     Shared Dispositive Power......................
--------------------------------------------------------------------------------
  9. Aggregate Amount Beneficially Owned by Each Reporting Person     2,055,000
--------------------------------------------------------------------------------
 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
     (See Instructions) ........................................................
--------------------------------------------------------------------------------
 11. Percent of Class Represented by Amount in Row (9)       5.8%
--------------------------------------------------------------------------------
 12. Type of Reporting Person (See Instructions) ...............................
--------------------------------------------------------------------------------
PN
 ................................................................................

 ................................................................................

 ................................................................................

 ................................................................................

 ................................................................................

 ................................................................................

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

SEC 1745 (3-98)                Page 2 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


ITEM 1.

         (A)      NAME OF ISSUER:

                  La Jolla Pharmaceuticals

         (B)      ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                  6455 Nancy Ridge Drive
                  San Diego, California 92121

ITEM 2.

         (A)      NAME OF PERSON FILING:

                  J.P. Morgan Partners (BHCA), L.P.

                  Supplemental information relating to the ownership and control
                  of the person  filing  this  statement  is included in
                  Exhibit 2(a) attached hereto.

         (B)      ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

                  1221 Avenue of the Americas
                  New York, New York  10020

         (C)      CITIZENSHIP:

                  Delaware

         (D)      TITLE OF CLASS OF SECURITIES (OF ISSUER):

                  Common Stock, par value $0.01 per share

         (E)      CUSIP NUMBER:

                  503459109

ITEM 3.  IF THIS  STATEMENT IS FILED  PURSUANT  TO SS.SS.240.13D-1(B) OR 240.
         13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:

                  Not applicable.

ITEM 4.  OWNERSHIP

         (A)      AMOUNT BENEFICIALLY OWNED:

                  2,055,000

         (B)      PERCENT OF CLASS:

                  5.8% (as of December 31, 2001).


SEC 1745 (3-98)                Page 3 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


         (C)      NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:

                  (i)      Sole power to vote or to direct  the vote:  2,055,000
                           shares of Common Stock.

                  (ii)     Shared  power  to vote or to  direct  the  vote:  Not
                           applicable.

                  (iii)    Sole power to  dispose  or to direct the  disposition
                           of: 2,055,000 shares of Common Stock

                  (iv)     Shared power to dispose or to direct the  disposition
                           of: Not applicable.

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

                  Not applicable.

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

                  Not applicable.

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 THE GROUP

                  Not applicable.

ITEM 9.  NOTICE OF DISSOLUTION OF GROUP

                  Not applicable.

ITEM 10. CERTIFICATION

                  (a)      Not applicable.

                  (b)      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.


SEC 1745 (3-98)                Page 4 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


                                    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.

Date:  February       , 2002
                ------

                                          J.P. MORGAN PARTNERS (BHCA), L.P.


                                          By:  JPMP Master Fund Manager, L.P.,
                                                  its General Partner

                                          By:  JPMP Capital Corp.,
                                                  its General Partner

                                          By:   /s/ JEFFREY C. WALKER
                                              ----------------------------------
                                              Name:    Jeffrey C. Walker
                                              Title:   President


SEC 1745 (3-98)                Page 5 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


                                  EXHIBIT 2(A)


                  This statement is being filed by J.P. Morgan Partners  (BHCA),
L.P.  (formerly  known as Chase Equity  Associates,  L.P.),  a Delaware  limited
partnership (hereinafter referred to as "JPMP (BHCA)"), whose principal business
office is located at 1221 Avenue of the Americas, New York, New York 10020. JPMP
(BHCA) is engaged in the venture  capital and  leveraged  buyout  business.  The
general partner of JPMP (BHCA) is JPMP Master Fund Manager, L.P. (formerly known
as Chase Capital Partners, a New York general  partnership),  a Delaware limited
partnership  (hereinafter  referred to as "JPMP Master Fund"),  whose  principal
business  office is located  at the same  address  as JPMP  (BHCA),  and is also
directly or indirectly  (through  affiliates) engaged in the venture capital and
leveraged  buyout  business.  The  general  partner of JPMP  Master Fund is JPMP
Capital  Corp.  (formerly  known  as  Chase  Capital  Corporation),  a New  York
corporation  (hereinafter referred to as "JPMP Capital Corp."),  whose principal
business  office is located  at the same  address  as JPMP  (BHCA),  and is also
engaged in the  venture  capital and  leveraged  buyout  business.  Set forth in
Schedule A hereto and incorporated  herein by reference are the names,  business
addresses,  principal  occupations and employments of each executive officer and
director of JPMP Capital Corp.

                  JPMP Capital Corp. is a wholly owned subsidiary of J.P. Morgan
Chase & Co.  (formerly  known as The Chase  Manhattan  Corporation),  a Delaware
corporation  (hereinafter  referred  to as "JP Morgan  Chase")  which is engaged
(primarily  through  subsidiaries)  in the commercial  banking business with its
principal office located at 270 Park Avenue, New York, New York 10017. Set forth
in  Schedule  B hereto  and  incorporated  herein by  reference  are the  names,
business  addresses,  principal  occupations  and  employments of each executive
officer and director of JP Morgan Chase.


SEC 1745 (3-98)                Page 6 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


                                                                      SCHEDULE A

                               JPMP CAPITAL CORP.

                             EXECUTIVE OFFICERS(1)


                                                           
President                                                     Jeffrey C. Walker*
Executive Vice President                                      Mitchell J. Blutt, M.D.*
Executive Vice President                                      Arnold L. Chavkin*
Executive Vice President                                      John M.B. O'Connor*
Managing Director                                             Dr. Dana Beth Ardi*
Managing Director                                             John R. Baron*
Managing Director                                             Christopher C. Behrens*
Managing Director                                             David S. Britts*
Managing Director                                             Julie Casella-Esposito*
Managing Director                                             Jerome Colonna*
Managing Director                                             Rodney A. Ferguson*
Managing Director                                             David L. Ferguson*
Managing Director                                             David Gilbert*
Managing Director                                             Eric A. Green*
Managing Director                                             Michael R. Hannon*
Managing Director                                             Donald J. Hofmann, Jr. *
Managing Director                                             W. Brett Ingersoll*
Managing Director                                             Alfredo Irigoin*
Managing Director                                             Andrew Kahn*
Managing Director                                             Jonathan R. Lynch*
Managing Director                                             Thomas G. Mendell*
Managing Director                                             Stephen P. Murray*
Managing Director                                             Timothy Purcell*
Managing Director                                             Faith Rosenfeld*
Managing Director                                             Robert R. Ruggiero, Jr. *
Managing Director                                             Susan L. Segal*
Managing Director                                             Kelly Shackelford*
Managing Director                                             Shahan D. Soghikian*
Managing Director                                             Patrick J. Sullivan*
Managing Director                                             Timothy J. Walsh*
Managing Director                                             Richard D. Waters, Jr. *
Managing Director                                             Damion E. Wicker, M.D.*
Managing Director                                             Eric R. Wilkinson*
Senior Vice President                                         Marcia Bateson*
Senior Vice President and Assistant Secretary                 Mounir Nahas*
Senior Vice President and Assistant Secretary                 Stephen Skoczylas*
Senior Vice President, Treasurer and Assistant Secretary      Elisa R. Stein*
Vice President and Assistant Secretary                        Jeffrey Glatt*
Vice President and Assistant Secretary                        Puneet Gulati*
Vice President and Assistant Secretary                        Sandra King*
Vice President and Assistant Secretary                        Scott Kraemer*
Secretary                                                     Anthony J. Horan**
Assistant Secretary                                           Robert C. Caroll**
Assistant Secretary                                           Denise G. Connors**


--------
(1) Each of whom is a United States citizen except for Messrs. Britts,  Irigoin,
    and Soghikian.

*   Principal  occupation is employee  and/or officer of J.P.  Morgan  Partners,
    LLC.  Business address is c/o J.P. Morgan Partners,  LLC, 1221 Avenue of the
    Americas, New York, New York 10020.

**  Principal  occupation  is  employee  or officer of J.P.  Morgan  Chase & Co.
    Business address is c/o J.P. Morgan Chase & Co., 270 Park Avenue,  New York,
    New York 10017.


SEC 1745 (3-98)                Page 7 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


                                  DIRECTORS(1)

                              William B. Harrison**
                               Jeffrey C. Walker*



--------
(1) Each of whom is a United States citizen except for Messrs. Britts,  Irigoin,
    and Soghikian.

*   Principal  occupation is employee  and/or officer of J.P.  Morgan  Partners,
    LLC.  Business address is c/o J.P. Morgan Partners,  LLC, 1221 Avenue of the
    Americas, New York, New York 10020.

**  Principal  occupation  is  employee  or officer of J.P.  Morgan  Chase & Co.
    Business address is c/o J.P. Morgan Chase & Co., 270 Park Avenue,  New York,
    New York 10017.


SEC 1745 (3-98)                Page 8 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


                                                                      SCHEDULE B


                             J.P. MORGAN CHASE & CO.

                              EXECUTIVE OFFICERS(1)


                                                                        
Chairman of the Board and Chief Executive Officer                          William B. Harrison Jr.*
Vice Chairman; Co-Chief Executive Officer, Investment Bank                 Geoffrey T. Boisi *
Vice Chairman; Head of Retail and Middle Market, Financial Services
      and Management and Private Banking                                   David A. Coulter*
Director of Human Resources                                                John J. Farrell*
Vice Chairman; Chairman, Investment Bank                                   Walter A. Gubert*
Vice Chairman                                                              Thomas B. Ketchum*
Director of Corporate Marketing and Communications                         Frederick W. Hill*
Vice Chairman; Co-Chief Executive Officer, Investment Bank                 Donald H. Layton*
Vice Chairman                                                              James B. Lee Jr. *
General Counsel                                                            William H. McDavid*
Vice Chairman; Head of Finance, Risk Management and Administration         Marc J. Shapiro*
Vice Chairman                                                              Jeffrey C. Walker**
Executive Vice President; General Auditor                                  William J. Moran*
Chief Financial Officer                                                    Dina Dublon*
Executive Vice President; Head of Market Risk Management                   Lesley Daniels Webster*
Managing Director; Corporate Treasurer                                     David B. Edelson*
Managing Director; Head of Credit Risk Policy                              Suzanne Hammett*
Corporate Secretary                                                        Anthony James Horan*
Senior Vice President; Chief Compliance Officer                            Gregory S. Meredith*
Controller                                                                 Joseph L. Scalfani*
Assistant Corporate Secretary                                              James C. Berry*


                                   DIRECTORS(1)

                          PRINCIPAL OCCUPATION OR EMPLOYMENT;
NAME                      BUSINESS OR RESIDENCE ADDRESS
--------------------------------------------------------------------------------
Hans W. Becherer          Retired Chairman of the Board and
                          Chief Executive Officer
                          Deere & Company
                          One John Deere Place
                          Moline, IL 61265
--------------------------------------------------------------------------------
Riley P. Bechtel          Chairman and Chief Executive Officer
                          Bechtel Group, Inc.
                          P.O. Box 193965
                          San Francisco, CA 94119-3965
--------------------------------------------------------------------------------
Frank A. Bennack, Jr.     President and Chief Executive Officer
                          The Hearst Corporation
                          959 Eighth Avenue
                          New York, New York  10019
--------------------------------------------------------------------------------

(1) Each of whom is a United States citizen.

*   Principal  occupation  is  employee  or officer of J.P.  Morgan  Chase & Co.
    Business address is c/o J.P. Morgan Chase & Co., 270 Park Avenue,  New York,
    New York 10017.

**  Principal  occupation is employee  and/or officer of J.P.  Morgan  Partners,
    LLC.  Business address is c/o J.P. Morgan Partners,  LLC, 1221 Avenue of the
    Americas, New York New York 10020.


SEC 1745 (3-98)                Page 9 of 10 pages



                                  SCHEDULE 13G

ISSUER:  La Jolla Pharmaceuticals                           CUSIP NO.: 503459109


                          PRINCIPAL OCCUPATION OR EMPLOYMENT;
NAME                      BUSINESS OR RESIDENCE ADDRESS
--------------------------------------------------------------------------------
Lawrence A. Bossidy       Chairman of the Board
                          Honeywell International
                          .O. Box 3000
                          Morristown, NJ 07962-2245
--------------------------------------------------------------------------------
M. Anthony Burns          Chairman of the Board
                          Ryder System, Inc.
                          3600 N.W. 82nd Avenue
                          Miami, Florida  33166
--------------------------------------------------------------------------------
H. Laurence Fuller        Retired Co-Chairman
                          BP Amoco p.l.c.
                          1111 Warrenville Road, Suite 25
                          Chicago, Illinois  60563
--------------------------------------------------------------------------------
Ellen V. Futter           President and Trustee
                          American Museum of Natural History
                          Central Park West at 79th Street
                          New York, NY 10024
--------------------------------------------------------------------------------
William H. Gray, III      President and Chief Executive Officer
                          The College Fund/UNCF
                          9860 Willow Oaks Corporate Drive
                          P.O. Box 10444
                          Fairfax, Virginia  22031
--------------------------------------------------------------------------------
William B. Harrison, Jr.  Chairman of the Board and Chief Executive Officer
                          J.P. Morgan Chase & Co.
                          270 Park Avenue, 8th Floor
                          New York, New York  10017-2070
--------------------------------------------------------------------------------
Helene L. Kaplan          Of Counsel
                          Skadden, Arps, Slate, Meagher & Flom LLP
                          Four Times Square
                          New York, New York  10036
--------------------------------------------------------------------------------
Lee R. Raymond            Chairman of the Board and Chief Executive Officer
                          Exxon Mobil Corporation
                          5959 Las Colinas Boulevard
                          Irving, TX 75039-2298
--------------------------------------------------------------------------------
John R. Stafford          Chairman of the Board
                          American Home Products Corporation
                          5 Giralda Farms
                          Madison, New Jersey  07940
--------------------------------------------------------------------------------
Lloyd D. Ward             Chief Executive Officer
                          U.S. Olympic Committee
                          One Olympic Plaza
                          Colorado Springs, CO  80909
--------------------------------------------------------------------------------
Marina v.N. Whitman       Professor of Business Administration and Public Policy
                          The University of Michigan
                          School of Public Policy
                          411 Lorch Hall, 611 Tappan Street
                          Ann Arbor, MI 48109-1220
--------------------------------------------------------------------------------

SEC 1745 (3-98)                Page 10 of 10 pages