Reaction catalyzed by alpha-mannan endo-1,2-alpha-mannanase (3.2.1.198)

		+		H2O	=			+
	methyl alpha-D-mannopyranosyl-(1->3)-alpha-D-mannopyranosyl-(1,2)-alpha-D-mannopyranosyl-(1,2)-alpha-D-mannopyranoside	+		H2O	=		alpha-1,3-mannobiose	+		methyl alpha-1,2-mannobioside