* Multiple-segment transmembrane protein of the Golgi apparatus that delivers UDP-Gal, synthesized in the cytosol, into the Golgi lumen. This is an antiport that simultaneously exchanges luminal UMP
* This is specific for UDP-Gal and not UDP-GlcNAc. It can also transport UDP-GalNAc
* CHO-derived Lec8 are incapable of transporting UDP-Gal but are competent in UDP-GlcNAc and CMP-Sia transport
* Mutant cells accumulate Glc-Cer instead of lactosylceramide, and contain truncated N-glycans terminated at GlcNAc
* Human UDP-Gal transporter occurs in two isoforms: hUGT1 and hUGT2
* The incorporation of galactose residues into the link tetra-saccharide of proteoglycans seems to be surprisingly resistant to the deficiency of UDP-Gal, as the amounts of chondroitin sulfate and heparin sulfate were not reduced significantly in UDP-Gal transporter-deficient cells derived from MDCK cells