Reaction catalyzed by duodenase (3.4.21.B3), lysyl endopeptidase (3.4.21.50), Signal peptidase I (3.4.21.89)

		+		H2O	=			+
	tosyl-Gly-Pro-Lys-p-nitroanilide	+		H2O	=		tosyl-Gly-Pro-Lys	+		p-nitroaniline