The function of B3GNT6 (UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 6, Ensembl gene identifier ENSG00000198488) is as follows. Beta-1,3-N-acetylglucosaminyltransferase that synthesizes the core 3 structure of the O-glycan, an important precursor in the biosynthesis of mucin-type glycoproteins. Plays an important role in the synthesis of mucin-type O-glycans in digestive organs.