X0202 4 2004-05-05 0 0001103390 INTRABIOTICS PHARMACEUTICALS INC /DE IBPI 0001244386 BAKER BIOTECH CAPITAL II GP LLC 667 MADISON AVENUE NEW YORK NY 10021 0 0 1 0 0001087939 BAKER JULIAN 667 MADISON AVENUE NEW YORK NY 10021 0 0 1 0 0001087940 BAKER FELIX 667 MADISON AVENUE NEW YORK NY 10021 0 0 1 0 Common Stock 2004-05-05 4 P 0 221996 13 A 430901 I See footnote In addition to Baker Biotech Capital II (GP), LLC, this Form 4 is being filed jointly by Felix J. Baker and Julian C. Baker, each of whom has the same business address as Baker Biotech Capital II (GP), LLC, and may be deemed to have a pecuniary interest in securities owned by it. Because of certain business and family relationships with other security holders of the Issuer, the Reporting Persons are filing solely for informational purposes as if they were members of a group with such security holders. However, the Reporting Persons disclaim that they and any other person or persons in fact constitute a "group" for purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, or Rule 13d-5 thereunder or that they are the beneficial owner of securities owned by such other persons. Includes dividends paid in shares of common stock on April 15, 2004 to all holders of Series A preferred stock, as a result of which Baker Biotech Fund II, L.P., received 679 shares of common stock and Baker Biotech Fund II (Z), L.P., received 84 shares of common stock. Represents 383,345 shares of common stock owned directly by Baker Biotech Fund II, L.P., and 47,556 shares of common stock owned directly by Baker Biotech Fund II (Z), L.P. Baker Biotech Fund II, L.P., and Baker Biotech Fund II (Z), L.P., are each limited partnerships of which the sole general partner is Baker Biotech Capital II, L.P., a limited partnership of which the sole general partner is Baker Biotech Capital II (GP), LLC. Felix J. Baker and Julian C. Baker are the controlling members of Baker Biotech Capital II (GP), LLC. /s/ Julian C. Baker, as Managing Member of Baker Biotech Capital II (GP), LLC 2004-05-07 /s/ Julian C. Baker 2004-05-07 /s/ Felix J. Baker 2004-05-07