Reaction catalyzed by exo-chitinase (non-reducing end) (3.2.1.200)

		+		H2O	=			+
	GlcNAcbeta(1->4)GlcNAcbeta(1->4)GlcNAcbeta(1->4)GlcNAcbeta(1->4)GlcNAcbeta(1->4)GlcNAc	+		H2O	=		N,N'-diacetylchitobiose	+		GlcNAcbeta(1->4)GlcNAcbeta(1->4)GlcNAcbeta(1->4)GlcNAcbeta