label: glycoprotein-N-acetylgalactosamine 3-beta-galactosyltransferase activity
label_lc: glycoprotein-n-acetylgalactosamine 3-beta-galactosyltransferase activity
description: "Catalysis of the addition of a galactosyl residue to a non-reducing O-linked N-acetylgalactosamine residue in an O-glycan."