ID 2.4.1.122 DE N-acetylgalactosaminide beta-1,3-galactosyltransferase. AN glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase. AN uridine diphosphogalactose-mucin beta-(1->3)-galactosyltransferase. CA an N-acetyl-alpha-D-galactosaminyl derivative + UDP-alpha-D-galactose = CA a beta-D-galactosyl-(1->3)-N-acetyl-alpha-D-galactosaminyl derivative + CA H(+) + UDP. CC -!- The eukaryotic enzyme can act on non-reducing O-serine-linked CC N-acetylgalactosamine residues in mucin glycoproteins, forming the CC T-antigen. CC -!- The bacterial enzyme, found in some pathogenic strains, is involved CC in biosynthesis of the O-antigen repeating unit. CC -!- Formerly EC 2.4.1.307. DR A0A2C9JXL4, C1GLT_BIOGL; Q0VC84, C1GLT_BOVIN; Q18515, C1GLT_CAEEL; DR Q5F3G7, C1GLT_CHICK; Q7K237, C1GLT_DROME; Q9NS00, C1GLT_HUMAN; DR Q9JJ06, C1GLT_MOUSE; Q9JJ05, C1GLT_RAT ; Q6GNL1, C1GLT_XENLA; DR Q08BL3, C1GTA_DANRE; Q7SYI5, C1GTB_DANRE; Q4KXC9, WBNJ_ECOLX ; //