GO:0016263

glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase activity

Details: 
Catalysis of the addition of a galactosyl residue to a non-reducing O-linked N-acetylgalactosamine residue in an O-glycan. [EC:2.4.1.122, GOC:ma]
Evidence Code: