ID 2.4.1.96 DE sn-glycerol-3-phosphate 1-galactosyltransferase. AN isofloridoside-phosphate synthase. CA sn-glycerol 3-phosphate + UDP-alpha-D-galactose = 1-O-alpha-D-galactosyl- CA sn-glycerol 3-phosphate + H(+) + UDP. CC -!- The product is hydrolyzed by a phosphatase to isofloridoside, which CC is involved in osmoregulation (cf. EC 2.4.1.137). //