Alkaline phosphatase
Alkaline phosphatases found in humans are membrane bound glycoproteins, which function to catalyze the hydrolysis of monophosphate esters. McKenna et al. (1979) found that there are at least three varieties of alkaline phosphatases, kidney, liver, and bone alkaline phosphatases, that are all coded by the same structural gene, but contain non-identical carbohydrate moieties. The alkaline phosphatase varieties, therefore, express a unique complement of in the enzymatic processes in post-translational glycosylation of proteins.