title: Further evidence for macromolecular nature of human C'1.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002499:Centrifugation, Density Gradient; D003165:Complement System Proteins; D004492:Edetic Acid / Q000494:pharmacology; D006461:Hemolysis; D006801:Humans; D007106:Immune Sera; D007075:Immunoglobulin M; D046911:Macromolecular Substances; D011817:Rabbits; D014461:Ultracentrifugation
chemical_list: D007106:Immune Sera; D007075:Immunoglobulin M; D046911:Macromolecular Substances; D003165:Complement System Proteins; D004492:Edetic Acid; D002118:Calcium