| Assay Method Information | |
| | DPP-IX Assay |
| Description: | DPP-IX was obtained and purified. Using Gly-Pro-AFC as the substrate, DPP-IV inhibitors as set forth in Table 2 below were assayed for DPP-IX inhibitory activity. Enzymatic reactions were conducted for various concentrations of DPP-IV inhibitors, using 200 ng DPP-IX and 100 μM Gly-Pro-AFC in a buffer solution containing 50 mM HEPES (pH 7.5) at room temperature. IC50 values of the inhibitors were determined by time-course tracing of the reaction rate using a fluorescence spectrometer and analyzing the results using TableCurve 2D (v 5.01). DPP-IV inhibitors were analyzed using the fluorescence spectrometer at the excitation and emission wavelengths of 405 nm and 505 nm, respectively. |
| Affinity data for this assay | |
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