Reaction catalyzed by beta-1,2-mannobiose phosphorylase (2.4.1.339)

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