title: Immunological characteristics of heat-killed Streptococcus type 1--sonic fractions obtained by zonal fractionation.
mesh_terms: D000645:Ammonium Sulfate; D000818:Animals; D000942:Antigens, Bacterial / Q000302:isolation & purification; D001426:Bacterial Proteins / Q000302:isolation & purification; D001770:Blood Bactericidal Activity; D002458:Cell Fractionation; D002501:Centrifugation, Zonal; D011232:Chemical Precipitation; D002845:Chromatography; D006386:Hemagglutination Tests; D006649:Histocompatibility Antigens / Q000302:isolation & purification; D006358:Hot Temperature; D007106:Immune Sera; D005779:Immunodiffusion; D011233:Precipitin Tests; D011817:Rabbits / Q000276:immunology; D012703:Serotyping; D013056:Spectrophotometry, Ultraviolet; D013297:Streptococcus pyogenes / Q000254:growth & development / Q000276:immunology*; D014732:Vibration
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D006649:Histocompatibility Antigens; D007106:Immune Sera; D000645:Ammonium Sulfate