UDP-galactosyltransferase activity 1,2-diacylglycerol 3-beta-galactosyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 molecular_function MGDG synthase activity KEGG_REACTION:R02691 RHEA:48480 uridine diphosphogalactose-1,2-diacylglycerol galactosyltransferase activity UDP galactose-1,2-diacylglycerol galactosyltransferase activity UDPgalactose:1,2-diacylglycerol 3-beta-D-galactosyltransferase activity UDP-galactose:diacylglycerol galactosyltransferase activity monogalactosyldiacylglycerol synthase activity MetaCyc:2.4.1.46-RXN 1beta-MGDG RHEA:48492 UDP-galactose-diacylglyceride galactosyltransferase activity RHEA:48496 UDP-galactose:1,2-diacyl-sn-glycerol 3-beta-D-galactosyltransferase activity EC:2.4.1.46 RHEA:14945 GO:0046509 Catalysis of the reaction: 1,2-diacyl-sn-glycerol + UDP-D-galactose = 1,2-diacyl-3-beta-D-galactosyl-sn-glycerol + H+ + UDP. 1-beta-MGDG activity