Deficiency of the fourth component of complement in man.
D000818:Animals; D044466:Asian People; D001609:Beta-Globulins; D003165:Complement System Proteins; D004912:Erythrocytes / Q000276:immunology; D006386:Hemagglutination Tests; D006461:Hemolysis; D006801:Humans; D007106:Immune Sera / Q000096:biosynthesis; D007120:Immunochemistry; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007153:Immunologic Deficiency Syndromes / Q000235:genetics / Q000276:immunology*; D007564:Japan; D012756:Sheep
D001609:Beta-Globulins; D007106:Immune Sera; D003165:Complement System Proteins