title: Cross-reactions among group A streptococci. IV. Extraction, separation and purification of two protective antigens of type G 1 cocci.
mesh_terms: D000042:Absorption; D000468:Alkalies; D000596:Amino Acids / Q000032:analysis; D000645:Ammonium Sulfate; D000818:Animals; D000942:Antigens, Bacterial / Q000302:isolation & purification*; D002473:Cell Wall / Q000276:immunology; D002845:Chromatography; D003429:Cross Reactions; D004591:Electrophoresis, Polyacrylamide Gel; D006863:Hydrogen-Ion Concentration; D007106:Immune Sera; D008747:Methylcellulose; D011506:Proteins; D011817:Rabbits; D012260:Ribonucleases; D013291:Streptococcus / Q000276:immunology*
chemical_list: D000468:Alkalies; D000596:Amino Acids; D000942:Antigens, Bacterial; D007106:Immune Sera; D011506:Proteins; D008747:Methylcellulose; D012260:Ribonucleases; D000645:Ammonium Sulfate