Antibiotic 5879 produced by Streptomyces aizunensis, identical with bicyclomycin.

In the previous paper1}, we presented a preliminary report on a new water-soluble antibiotic 5879 produced by Streptomyces No. 5879. Differences in the taxonomic properties of the strain from those of recognized species were considered to be significant enough to propose the new species Streptomyces aizunensis nov. sp. for this strain, and antibiotic 5879 was named aizumycin. This report deals with the taxonomy of the producing organism, the isolation of crystalline antibiotic 5879, and the comparison of the physical, chemical and biological properties of the antibiotic with those of bicyclomycin2).