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T-lymphocyte- associated antigen 4—Immunoglobulin G1 fragment fusion protein, recombinant Oncostatin M (human precursor)—Immunoglobulin G1 fusion protein; BMS-188667 cytotoxic T-lymphocyte-associated antigen --Immunoglobulin G1 fragment fusion protein, recombinant 25-Oncostatin M (human precursor)--Immunoglobulin G1 fusion protein; BMS-188667 portion of human immunoglobulin G1 (human heavy chain fragment region) of human immunoglobulin G1 (IgG1). immunoglobulin antigen) (human) fusion protein with immunoglobulin G1 (human heavy chain fragment T-lymphocyte-associated antigen 4-immunoglobulin G1 fragment fusion protein, recombinant member of immunoglobulin (Ig) superfamily. CTLA4 is a member of immunoglobulin superfamily. CD28 (CTLA4 ligand) is