Reaction catalyzed by mannosyl-oligosaccharide 1,2-alpha-mannosidase (3.2.1.113)

		+		H2O	=			+
	Man9GlcNAc2	+		H2O	=		Man8GlcNAc2 (isomer 8A1,2,3B1,3)	+		D-mannose