Carboxy-Terminal Amino Acids of γA and γM Heavy Chains

Abstract
The carboxy-terminal amino acids of α-and µ-chains from human immunoglobulins and α-chains from mouse immunoglobulins have been determined by carboxypeptidase digestion and hydrazinolysis. The data suggest the following carboxy-terminal sequences: human µ: Ala-Gly-Thr-Cys-TyrCOOH; human α: Thr-Cys-TyrCOOH; murine α: (Ileu, Cys)-TyrCOOH.