Reaction catalyzed by trypsin (3.4.21.4)

		+			=			+
	Nbeta-Boc-beta-Ala-(p-guanidino)phenyl ester	+		beta-Ala-4-nitroanilide	=		Nbeta-Boc-beta-Ala-beta-Ala-4-nitroanilide	+		1-(4-hydroxyphenyl)guanidine