fucosylgalactoside 3-alpha-galactosyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 UDPgalactose:alpha-L-fucosyl-(1,2)-D-galactoside 3-alpha-D-galactosyltransferase activity MetaCyc:2.4.1.37-RXN Reactome:R-HSA-9033961 RHEA:84743 RHEA:84523 UDPgalactose:glycoprotein-alpha-L-fucosyl-(1,2)-D-galactose 3-alpha-D-galactosyltransferase activity RHEA:84527 B transferase activity Reactome:R-HSA-9034053 EC:2.4.1.37 UDP-galactose:alpha-L-fucosyl-(1->2)-D-galactoside 3-alpha-D-galactosyltransferase activity molecular_function GO:0004381 blood-group substance beta-dependent galactosyltransferase activity Catalysis of the reaction: UDP-galactose + glycoprotein-alpha-L-fucosyl-(1,2)-D-galactose = UDP + glycoprotein-alpha-D-galactosyl-(1,3)-(alpha-L-fucosyl-(1,2))-D-galactose. fucosylglycoprotein 3-alpha-galactosyltransferase activity RHEA:84519 RHEA:84739 histo-blood substance B-dependent galactosyltransferase activity blood-group substance B-dependent galactosyltransferase activity UDPgalactose:O-alpha-L-fucosyl(1->2)D-galactose alpha-D-galactosyltransferase activity UDPgalactose:alpha-L-fucosyl-(1->2)-D-galactoside 3-alpha-D-galactosyltransferase activity histo-blood group B transferase activity UDP-galactose:alpha-L-fucosyl-(1,2)-D-galactoside 3-alpha-D-galactosyltransferase activity glycoprotein-fucosylgalactoside alpha-galactosyltransferase activity [blood group substance] alpha-galactosyltransferase activity RHEA:14349 histo-blood substance beta-dependent galactosyltransferase activity UDPgalactose:O-alpha-L-fucosyl(1,2)D-galactose alpha-D-galactosyltransferase activity UDP-galactosyltransferase activity