Preparation of Protein-Free Scarlatinal Toxin

[摘要] 1. 1. A proteose-peptone-free medium is described which permits the production of scarlatinal toxin with a potency of 40,000 to 150,000 STD/ml using NY-5 and Dick I–IV strains of hemolytic streptococcus.2. 2. Crude toxins prepared on this medium can be concentrated and purified by salt-precipitation and dialysis to yield a protein-free antigenic toxin.

[学科分类] 生物科学（综合）