title: Studies on antigen preparations from Staphylococcus aureus. 4. Separation and purification of protein A and a related precipitinogen.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D000941:Antigens; D001426:Bacterial Proteins / Q000302:isolation & purification*; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D008722:Methods; D011234:Precipitins; D011817:Rabbits; D013210:Staphylococcus / Q000276:immunology*
chemical_list: D000596:Amino Acids; D000941:Antigens; D001426:Bacterial Proteins; D007106:Immune Sera; D011234:Precipitins