title: The complement system in bullous pemphigoid. VI. C3 fixing activity in the absence of detectable antibody.
mesh_terms: D001485:Basement Membrane / Q000276:immunology; D003172:Complement C1 / Q000032:analysis; D003176:Complement C3 / Q000276:immunology*; D003181:Complement C4 / Q000032:analysis; D003168:Complement Fixation Tests; D003171:Complement Pathway, Classical; D005337:Fibrin / Q000032:analysis; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D011414:Properdin / Q000032:analysis; D012867:Skin / Q000276:immunology*; D012872:Skin Diseases, Vesiculobullous / Q000276:immunology*
chemical_list: D003172:Complement C1; D003176:Complement C3; D003181:Complement C4; D007136:Immunoglobulins; D011414:Properdin; D005337:Fibrin