Para-Nitrophenylphosphate

para-Nitrophenylphosphate (pNPP) is a chromogenic substrate for acid and alkaline phosphatase in ELISA assays. Under their influence the decay to yellow para-nitrophenol is catalysed. This product can be measured with a 405 nm spectrophotometer.


 * $$PNPP \overrightarrow{_{AP}} PNP$$