... inclusion in the MetaCyc reference database includebiosynthesis of androgens, biosynthesis of corticosteroids,biosynthesis of estrogens, biosynthesis of prostaglandins,biosynthesis of serotonin and ... (Adc) of the human enzyme, how-ever, lacks amine decarboxylating activity and, instead,appears to function as an ornithine decarboxylase antizymeinhibitor (oazin) in the superpathway of ornithine ... and melatonin, ceramide biosyn-thesis, cyclic AMP biosynthesis, cyclic GMP biosynthesis, Lel-oir pathway, sphingomyelin metabolism, sphingosine and sphingosine-1-phosphate metabolism, and L-ascorbate...