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| | Inhibition Assay |
| Description: | 5 μL of a human cathepsin S enzyme (R&D1183-CY-010) was added to a 96-well plate so as to be 20 ng/well. Next, 10-fold dilution of the test compound (a 10 mM DMSO solution) was serially performed with a buffer solution for assay (a solution of 50 mM sodium methoxide, 250 mM sodium chloride and 5 mM dithiothreitol (DTT), adjusted to pH=4.5 with 1 N hydrochloric acid) six times such that the final concentration becomes 0.1 nM to 10 μM then, 20 μL of each of the solutions was added to the wells (the final DMSO concentration was 0.1%), and 25 μL of synthetic substrate VVR-AMC (3211-V manufactured by PEPTIDE INSTITUTE, INC.) was added thereto such that the final concentration becomes 40 μM, thereby starting a enzyme reaction. A fluorescence intensity (an excitation wavelength: 380 nm and a fluorescent wavelength: 460 nm) was measured at 37° C. for 10 minutes immediately after the start of the reaction using a fluorescence spectrophotometer (SPECTRA MAX GEMINI, manu |
| Affinity data for this assay | |
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