Reaction catalyzed by prolyl oligopeptidase (3.4.21.26), coagulation factor XIa (3.4.21.27)

		+		H2O	=			+
	benzyloxycarbonyl-Gly-Pro-4-nitroanilide	+		H2O	=		benzyloxycarbonyl-Gly-Pro	+		4-nitroaniline