galactosylgalactosylglucosylceramide beta-D-acetylgalactosaminyltransferase activity
UDP-N-acetyl-D-galactosamine:alpha-D-galactosyl-(1->4)-beta-D-galactosyl-(1->4)-beta-D-glucosylceramide 3III-beta-N-acetyl-D-galactosaminyltransferase activity