Description_x000D_ Application_x000D_ Nicotinamide guanine dinucleotide (NGD+) may be used as a preferred substrate of specific snake Trimeresurus stejnegeri venom phospodiesterase and a substrate to study the specificity and kinetics of ADP-ribosyl cyclase(s)._x000D_ Nicotinamide guanine dinucleotide sodium salt has been used as a substrate for measuring the cyclase activity of the enzyme cluster of differentiation 38 (CD38). It has also been used as a substrate to fluorometrically determine the activity of CD38/ADP-ribose (ADPR)._x000D_ Packaging_x000D_ 25 mg in poly bottle_x000D_ 5 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Nicotinamide guanine dinucleotide sodium salt is used to determine the activity of proteins that generate cyclic-ADP-ribose (cADPR) in the ADP-ribosyl cyclase family._x000D_ Other Notes_x000D_ Analog of β-NAD