4-Nitrophenyl β-D-glucuronide (pNPG_1) is aderivative of 4-nitrophenol 4-Nitrophenyl β-D-glucuronide is a chromogenic compound and is the chromogenic substrate for β-glucuronidase[1].
[1]. A Mariscal, et al. Interference by carbohydrate substrates, flavonoids, and monosaccharide derivatives on bacterial beta-D-glucuronidase assays. Arch Environ Contam Toxicol. 1998 Nov;35(4):588-93.
















