Studies on antibiotics from the genus Bacillus. VIII. Isolation of three new antibiotics, thiocillins I, II and III, related to micrococcin P.

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Abstract
Thiocillins I and II were isolated from the culture broth of B. cereus G-15, and thiocillins II and III from that of B. badius AR-91. Also, the former 2 were probably produced by B. megaterium I-13. These antibiotics active against gram-positive bacteria are soluble in a mixture of chloroforma nd methanol, show characteristic UV absorptions (maxima at about 275 nm and 348 nm), and contain a high content of S, as much as approximately 15%. They are related to each other and also to micrococcin P, but differentiated by chromatographic behaviors.