Abstract
Two minor components of tuberactinomycin have been isolated from cultures of Streptomyces griseoverticillatus var. tuberacticus1) and named tuberactinomycin B and tuberactinomycin O. Tuberactinomycin O is a new member of the tuberactinomycin family with biological activity similar to that of tuberactinomycin N. Tuberactinomycin B, on the other hand, has properties similar to viomycin and is considered to be identical with it. The characterization and properties of these two antibiotics are reported in this paper.
