title: [Isolation and characterization of erythrogenic toxins of Streptococcus pyogenes 3. communication: comparative studies of type A erythrogenic toxins (author's transl)].
abstract: The production of type A erythrogenic toxin was determined in 11 strains of Streptococcus pyogenes (serological group A). All strains produced this toxin, at quantities varying between 16 mg/l (strain "Smith") and 0.03 mg/l (strain T18). The erythrogenic toxins of 5 strains were purified by adsorption to silicate, elution, precipitation with ammonium sulfate, treatment with calcium phosphate, CM-Sepharose chromatography and gel filtration on Sephacryl S200. The preparations were found to be homogenous in SDS electrophoresis and isoelectric focusing (m.w. between 27 000 an 28 000; i.p. 52). They were serologically identical by immunodiffusion (Ouchterlony), and no spur formation was seen with crude concentrates of the toxins produced by the remainder of the strains.
mesh_terms: D001426:Bacterial Proteins; D001427:Bacterial Toxins / Q000276:immunology / Q000302:isolation & purification*; D000939:Epitopes; D005098:Exotoxins / Q000276:immunology / Q000302:isolation & purification*; D008565:Membrane Proteins; D008970:Molecular Weight; D013297:Streptococcus pyogenes / Q000032:analysis* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D001427:Bacterial Toxins; D000939:Epitopes; D005098:Exotoxins; D008565:Membrane Proteins; C117980:SpeA protein, Streptococcus pyogenes; C027951:erythrogenic toxin
vernacular_title: Isolierung und Charakterisierung erythrogener Toxine von Streptococcus pyogenes 3. Mitteilung: Vergleichende Untersuchungen erythrogener Toxine vom Typ A.