label: lactosylceramide beta-1,3-galactosyltransferase activity
label_lc: lactosylceramide beta-1,3-galactosyltransferase activity
description: "Catalysis of the reaction: D-galactosyl-(1->4)-beta-D-glucosyl-R + UDP-D-galactose = D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-R + H+ + UDP."