the seminal plasma carboxypeptidase has a neutral ph optimum , is inhibited by o-phenanthroline and by the inhibitor of carboxypeptidase b-type enzymes , 2-mercaptomethyl-3-guanidinoethylthiopropanoic acid , and can be activated by cobalt .
C0007075
carboxypeptidase
C0054756
carboxypeptidase b