Abstract
The characterization was conducted on racemomycin (abbreviated as RM) A, B, C, and minor D components isolated in pure form by column chromatographies. RM-A was identified with streptothricin. Amino acid analysis of the acid hydrolysates revealed the presence of 1, 2, 3 and 4 β-1ysine residues in RM-A, C, B, and D components respectively, And also it was apparent that the biological activities such as antimicrobial, antiviral and acute toxicity were stronger in order of the number of β-1ysine residues in a molecule.
