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. 2016 Jun 30;60(1):49–58. doi: 10.1042/EBC20150006

Figure 1. Illustration of protein phosphatase 2A (PP2A) inhibition assay concept.

Figure 1.

PP2A catalyses the conversion of p-nitrophenyl phosphate (p-NPP) into p-nitrophenol (p-NP). The coloured product can be measured spectrophotometrically. DSP group toxins, such as OA, block the binding site of the PP2A enzyme, preventing the catalysis of p-NPP.