Gly-Xaa carboxypeptidase (, glycine carboxypeptidase, carboxypeptidase a, carboxypeptidase S, peptidase alpha, yeast carboxypeptidase) is an enzyme. This enzyme catalyses the following chemical reaction
Release of a C-terminalamino acid from a peptide in which glycine is the penultimate amino acid, e.g. Z-Gly!Leu