Reaction catalyzed by thrombin (3.4.21.5), chymase (3.4.21.39), Subtilisin (3.4.21.62), Oryzin (3.4.21.63)

		+		H2O	=			+
	Ala-Ala-Pro-Phe-4-nitroanilide	+		H2O	=		Ala-Ala-Pro-Phe	+		4-nitroaniline