title: Selective deficiency of the second component of complement in a patient with anaphylactoid purpura.
mesh_terms: D000818:Animals; D000937:Antigen-Antibody Reactions; D002648:Child; D003175:Complement C2 / Q000172:deficiency*; D003176:Complement C3 / Q000032:analysis; D003181:Complement C4 / Q000032:analysis; D003182:Complement C5 / Q000032:analysis; D003165:Complement System Proteins / Q000172:deficiency*; D003601:Cytotoxicity Tests, Immunologic; D004912:Erythrocytes / Q000276:immunology; D006168:Guinea Pigs; D006461:Hemolysis; D006801:Humans; D011695:IgA Vasculitis / Q000235:genetics / Q000276:immunology*; D007106:Immune Sera / Q000302:isolation & purification; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D011414:Properdin / Q000032:analysis; D011513:Proteus mirabilis / Q000276:immunology; D011817:Rabbits / Q000276:immunology; D011863:Radioimmunoassay; D012756:Sheep / Q000276:immunology
chemical_list: D003175:Complement C2; D003176:Complement C3; D003181:Complement C4; D003182:Complement C5; D007106:Immune Sera; D011414:Properdin; D003165:Complement System Proteins