Reaction catalyzed by beta-1,2-mannosidase (3.2.1.197)

		+		H2O	=			+
	beta-D-mannopyranosyl-(1->2)-beta-D-mannopyranosyl-(1->2)-beta-D-mannopyranosyl-(1->2)-D-mannopyranose	+		H2O	=		beta-D-mannopyranosyl-(1->2)-beta-D-mannopyranosyl-(1->2)-D-mannopyranose	+		alpha-D-mannopyranose