Hog pancreatic α-amylase peptides from tryptic digest of isozyme AII

Abstract

Peptides isolated from the tryptic digest of the S-sulfo derivative of isozyme AII by gel filtration on Sephadex columns, paper chromatography and electrophoresis were sequenced by the phenylisothiocyanate method. The sequential regions determined account for 319 nonoverlapping amino acid residues in 46 peptides. Sequences around methionine residues and problems of isolation of amylase isozymes are discussed.