Source:http://linkedlifedata.com/resource/umls/id/C1152116
GO: Catalysis of the reaction: 1,2-diacyl-3-beta-D-galactosyl-sn-glycerol + UDP-D-galactose = 3-[alpha-D-galactosyl-(1->6)-beta-D-galactosyl]-1,2-diacyl-sn-glycerol + H(+) + UDP. [EC:2.4.1.241, RHEA:10523]