Product nameoNPG, beta-galactosidase substrate
β-galactosidase substrate for colorimetric and EIA applications. Hydrolysed by β-galactosidase to yield galactose and ortho-Nitrophenol, which is yellow in color.
Storage instructionsStore at -20°C. Store under desiccating conditions. The product can be stored for up to 12 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
This product has been referenced in:
- Warmerdam A et al. Effects of carbohydrates on the oNPG converting activity of ß-galactosidases. J Agric Food Chem 61:6458-64 (2013). Read more (PubMed: 23725091) »
- LaPage SP et al. The ortho-nitrophenol (ONPG) test and acid from lactose in Gram-negative genera. J Clin Pathol 26:821-5 (1973). Read more (PubMed: 4587939) »