Sakyomicins A, B, C and D: new quinone-type antibiotics produced by a strain of nocardia. taxonomy, production, isolation and biological properties.

Actinomycete strain M-53, a new soil isolate, was found to produce four quinone-type antibiotics. Antibiotic sakyomicin components, A, B, C and D were isolated from the fermentation broth of strain M-53 by XAD-2 column chromatography, silica gel column chromatography and Sephadex LH-20 column chromatography. The components are active against Gram-positive bacteria. Strain M-53 was identified as a strain of genus Nocardia.