A study of the peptides of cystine in partial hydrolysates of wool

Abstract

A chromatographic method is presented for the identification of lower peptides of cystine in partial hydrolysates of wool. Thirteen dipeptides were identified and a number of higher peptides of undetermined residue order. It is concluded that, in wool, most of the mono-amino-monocarboxylic acids are combined both through their amino and carboxyl groups to residues of cysteine. Evidence has been obtained for the. formation of intermediate oxidation products of combined cystirie by the action of H2O2 on wool. A number of dipeptides of L-cysteine and of L-cysteic acid were synthesized.