

4-Nitrophenyl β-D-Xylopyranoside by Molecular Depot is a 4-nitrophenyl glycoside substrate for β-xylosidase. Cleavage releases 4-nitrophenol, which is yellow in alkaline solution and read at 405 nm. It is used to measure β-xylosidase activity in colorimetric assays and to screen inhibitors. Each unit contains 50 mg. MBP supplies Molecular Depot carbohydrate reagents to research labs in the United States, Canada and worldwide.