lactosylceramide 4-alpha-galactosyltransferase activity
lactosylceramide 4-alpha-galactosyltransferase activity
Catalysis of the reaction: beta-D-galactosyl-(1,4)-D-glucosylceramide + UDP-galactose = alpha-D-galactosyl-(1,4)-beta-D-galactosyl-(1,4)-D-glucosylceramide + UDP.