title: Occurrence of Fc-reacting factor in acid extracts of Streptococcus pyogenes and its relationship to M protein.
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis* / Q000302:isolation & purification; D006386:Hemagglutination Tests; D007141:Immunoglobulin Fc Fragments; D007074:Immunoglobulin G; D013297:Streptococcus pyogenes / Q000032:analysis*
chemical_list: D001426:Bacterial Proteins; D007141:Immunoglobulin Fc Fragments; D007074:Immunoglobulin G