sn-glycerol 3-phosphate + UDP-alpha-D-galactose <=> 1-O-alpha-D-galactosyl-sn-glycerol 3-phosphate + UDP + H(+)
sn-glycerol 3-phosphate + udp-alpha-d-galactose <=> 1-o-alpha-d-galactosyl-sn-glycerol 3-phosphate + udp + h(+)