the inhibitors tested included : ( i ) aprotinin ( a serine protease inhibitor ) , ( ii ) n-acetyl-l-tyrosine ethyl ester ( a chymotrypsin substrate and competitive inhibitor of protein degradation ) , ( iii ) carboxypeptidase inhibitor ( a metallo-exopeptidase inhibitor ) and ( iv ) inhibitor ii ( a chymotrypsin/trypsin inhibitor ) .
C0007075
carboxypeptidase
C0117059
exopeptidase