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An aerobic actinomycete strain isolated from an Indian soil sample and designated No. E864-61 was found to produce in submerged fermentation a new antibiotic complex, Bu-2313 (components A and B). Strain E864-61 forms single, pairs or chains of three to eight spores on the aerial mycelium and its aerial mass color is grayish blue-green. The cell wall of strain E864-61 contains meso-diaminopimelic acid and galactose. Strain E864-61 has been classified as a new species of the genus Microtetraspora and designated as Microtetraspora caesia sp. nov.


K Tomita, Y Hoshino, T Sasahira, K Hasegawa, M Akiyama, H Tsukiura, H Kawaguchi. Taxonomy of the antibiotic Bu-2313-producing organism. Microtetraspora caesia sp. nov. The Journal of antibiotics. 1980 Dec;33(12):1491-501

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PMID: 6910477

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