Determination of the Amino- and Carboxyl-terminal Residues of an Immuno-competence Promoting Protein, P-MSY, from Bovine Parotid Glands

Abstract

A protein, P-MSY, with immuno-competence promoting activity as well as antitumor activity has been isolated from bovine parotid glands. To help identify and characterize this protein, the amino-terminal and carboxylterminal amino acids were determined by Edman degradation and carboxypeptidase digestion. The amino-terminal was Ser-His- and the carboxyl-terminal was -Leu-His.