Reaction catalyzed by Pyrococcus furiosus beta-glycosidase (3.2.1.B28)

		+			=			+		H2O
	lactose	+		N,N'-diacetylchitobiose	=		Gal-beta(1,4)-GlcNAc-beta(1,3)-Gal-beta(1,4)-Glc	+		H2O