Visfatin-1 (Nicotinamide phosphoribosyltransferase) is a glycosyltransferase,Porcinearticipating the NAD biosynthesis. It catalyzes the condensation of nicotinamide with 5-phophoribosyl-1-pyrophosphate to yield nicotinamide mononucleotide, an intermediate in the biosynthesis of NAD. Visfatin-1 is the rate limiting component in the mammalian NAD biosynthesis pathway. Visfatin-1 is highly e, Xenopus/Amphibian,pressed in bone marrow, liver,Mouse,uscles, heart,Porcinelacenta, lung and kidney tissues.