Reaction catalyzed by mannosyl-oligosaccharide alpha-1,3-glucosidase (3.2.1.207)

		+		H2O	=			+
	Glc2Man9GlcNAc2-[protein]	+		H2O	=		GlcMan9GlcNAc2-[protein]	+		beta-D-glucopyranose