[New producer of amphomycin-group antibiotics]

An actinomycetous culture 33 inhibiting the growth of grampositive bacteria was isolated from a soil sample. The culture was classified as belonging to Streptomyces albogriseolus. It was found that culture 33 produced antibiotics of the amphomycin group. The antibiotic complex consists of 2 components, one of which is identical to amphomycin and the other differs from it. Conditions for the complex production were also investigated. Production of amphomycin by Str. albogriseolus was observed for the first time.