Carboxypeptidase
The inactive zymogen procarboxypeptidase is activated by trypsin .The further action on the polypeptides is carried out by carboxypeptidase which attacks the carboxy terminal peptide bond, liberating single amino acids. So you realize that carboxypeptidase hydrolyses peptide bonds from the end of the peptide chain. Therefore, it is called as an exopeptidase (unlike trypsin, chymotrypsin and elastase). Further, since this enzyme acts on the peptide bonds of the peptide chain containing free COOH (carboxylic) group, it is specifically called carboxypeptidase.