Reaction catalyzed by dolichyl-phosphate beta-D-mannosyltransferase (2.4.1.83)

		+		C55-polyisoprenol	=			+		D-mannosyl-C55-polyisopropenol
	GDPmannose	+		C55-polyisoprenol	=		GDP	+		D-mannosyl-C55-polyisopropenol