Poly-L-lysine produced by streptomyces. Chemical studies.

The chemical nature of the Dragendorff-positive substance produced by Streptomyces albulus was investigated. The substance was found to be a homopolymerof L-lysine connected with 25 - 30 residues in an isopeptide linkage. The ε-poly-L-lysine is a unique natural substance not described before now.