label: digalactosyldiacylglycerol synthase activity
label_lc: digalactosyldiacylglycerol synthase activity
description: "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."