The third component of complement and complement receptors.
D000936:Antigen-Antibody Complex; D001665:Binding Sites; D002051:Burkitt Lymphoma / Q000276:immunology; D002460:Cell Line; D003169:Complement Inactivator Proteins; D003165:Complement System Proteins; D006801:Humans; D007104:Immune Adherence Reaction; D013388:Succinimides / Q000494:pharmacology; D014357:Trypsin / Q000494:pharmacology
D000936:Antigen-Antibody Complex; D003169:Complement Inactivator Proteins; D013388:Succinimides; D003165:Complement System Proteins; D014357:Trypsin