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A procedure allowing the purification of milligram amounts of the exocellular dd-carboxypeptidase-transpeptidase from Streptomyces R61 to protein homogeneity (95% purity) is described. The isolated protein has a molecular weight of about 38000 and consists of one polypeptide chain. Its amino acid composition is presented.

Molecular weight and amino acid composition of the exocellular dd-carboxypeptidase–transpeptidase of Streptomyces R61