Reaction catalyzed by exo-1,4-beta-D-glucosaminidase (3.2.1.165)

		+		H2O	=			+
	GlcN(beta1-4)GlcN(beta1-4)GlcN(beta1-4)GlcN	+		H2O	=		GlcN(beta1-4)GlcN(beta1-4)GlcN	+		D-glucosamine