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Assay Method Information |
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| | Inhibition Assay |
| Description: | Using a 96 well plate (#3915, Costar), a test compound (25 μL) was mixed with 20 μM fluorescence enzyme substrate (Boc-Phe-Ser-Arg-AMC, 50 μL) mixed with 200 mM Tris-HCl buffer (pH 8.0), and human trypsin (Sigma, 25 μL) was added. Using a fluorescence plate reader fmax (Molecular Devices, Inc.), the reaction rate was measured from the time-course changes at excitation wavelength 355 nm and fluorescence wavelength 460 nm. The Ki value was calculated from the concentration of the test compound, reciprocal of reaction rate, and Km value of the enzyme substrate, and by using Dixon plot. |
| Affinity data for this assay | |
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