Responsible for the synthesis of complex-type N-linked oligosaccharides in many glycoproteins as well as the carbohydrate moieties of glycolipids . Can produce lactose .
Subcellular locations: Golgi apparatus, Golgi stack membrane
Trans cisternae of Golgi stack.
Weakly expressed in various tissues. Highest expression in prostate, testis, ovary, intestine, muscle, and in fetal brain.