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Assay Method Information |
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| | Enzymatic Assay |
| Description: | The enzyme source used is recombinant human chymase (expressed in HEK293 cells) or chymase purified from hamsters' tongues. The substrate used for chymase is Abz-HPFHL-Lys(Dnp)-NH2. For the assay, 1 μl of a 50-fold concentrated solution of test substance in DMSO, 24 al of enzyme solution (dilution 1:80 000 human or 1:4000 hamster) and 25 al of substrate solution (final concentration 10 μM) in assay buffer (Tris 50 mM (pH 7.5), sodium chloride 150 mM, BSA 0.10%, Chaps 0.10%, glutathione 1 mM, EDTA 1 mM) are combined in a white 384-hole microtiter plate (Greiner Bio-One, Frickenhausen, Germany). The reaction is incubated at 32 degrees for 60 min and the fluorescence emission at 465 nm after excitation at 340 nm is measured in a fluorescence reader, for example Tecan Ultra (Tecan, M nnedorf, Switzerland). |
| Affinity data for this assay | |
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