CHEMBL5737520

Matriptase Inhibition: Enzymatic assays and Ki determination were performed at room temperature in an assay buffer containing 50 mM Tris-HCl, 150 mM NaCl and 500 μg/mL BSA at pH 7.4. To determine which method to use for the evaluation of inhibition, 0.25 nM protease was added to a reaction buffer containing 0 nM, 2.5 nM or 1 mM of inhibitors and 200 μM of a fluorogenic substrate (Boc-Gln-Ala-Arg-AMC). Proteolytic activity was monitored by measuring the release of fluorescence (excitation; 360 nm, emission; 441 nm) in a FLX800 TBE microplate reader (Bio-Tek Instruments, Winooski, Vt., USA).