[Localization of pyruvic acid in the histidine decarboxylase of Micrococcus sp. n].

A fragment containing the pyruvic acid residue is isolated from hymotryptic hydrolyzate of alpha-polypeptide chain of carboxymethylated histidine decarboxylase (HD) 14C-phenylhydrasone. The pyruvate residue is estimated to be bind with alpha-amino group of N-terminal phenylalanine in alpha-polypeptide chain. N-terminal alanine is found in HD alpha-polypeptide chain after its reductive amination. It makes possible to determine the estimation of N-terminal amino acid sequence in HD alpha-chain.