Assay Method Information | |
| Inhibition Assay |
Description: | Compounds were tested against mPTPB using the p-nitrophenyl phosphate (pNPP) assay system in a Cary 100 UV-Vis spectrophotometer by monitoring the increase in absorbance of product formed, p-nitrophenol (pNP) at 405 nm. The reaction was started by the addition of mPTPB into a final volume of 200 μL master mix containing pH 7.0 3,3-Dimethyl glutarate buffer (50.0 mM, 1 mM EDTA, 0.15M NaCl), 3.0 mM pNPP. IC50 values for each compound were determined by varying the concentration of the inhibitor at fixed concentrations of the enzyme and by fitting the dose-response data into the four-parameter logistic curve (eq 1) model of GraphPad prism 7.02, as follows. A I /A 0 =IC 50/(IC 50+[I]).The inhibition assay for these PTPs were performed under the same conditions as mPTPB except using a different pNPP concentration corresponding to the Km of the FTP studied. |
Affinity data for this assay | |
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