an alpha-L-fucosyl-(1->2)-beta-D-galactosyl derivative + UDP-N-acetyl-alpha-D-galactosamine = an N-acetyl-alpha-D-galactosaminyl-(1->3)-[alpha-L-fucosyl-(1->2)]-beta-D-galactosyl derivative + H(+) + UDP an alpha-L-fucosyl-(1->2)-beta-D-galactosyl derivative + UDP-alpha-D-galactose = an alpha-D-galactosyl-(1->3)-[alpha-L-fucosyl-(1->2)]-beta-D-galactosyl derivative + H(+) + UDP Binds 1 Mn(2+) ion per subunit. Protein modification; protein glycosylation. Membrane-bound form in trans cisternae of Golgi. Secreted into the body fluid (By similarity). Submaxillary glands (at protein level). The conserved DXD motif is involved in cofactor binding. The manganese ion interacts with the beta-phosphate group of UDP and may also have a role in catalysis. Belongs to the glycosyltransferase 6 family.