Reaction catalyzed by oligo-1,6-glucosidase (3.2.1.10), alpha-glucosidase (3.2.1.20), glucan 1,6-alpha-glucosidase (3.2.1.70), mannosyl-oligosaccharide alpha-1,3-glucosidase (3.2.1.207)

		+		H2O	=	2
	nigerose	+		H2O	=		2 D-glucose