Reaction catalyzed by sn-glycerol-3-phosphate 1-galactosyltransferase (2.4.1.96)

		+			=			+
	UDP-alpha-D-galactose	+		sn-glycerol 3-phosphate	=		UDP	+		1-O-alpha-D-galactosyl-sn-glycerol 3-phosphate