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Assay Method Information |
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| | Enzyme Assay |
| Description: | Inhibitory activity of compounds was assessed by a fluorescence quench assay of BACE activity. The assay was performed at room temperature in 96-well white opaque Optiplates aque Optiplates (PerkinElmer, Waltham, Mass.) in a total volume of 200 μl of the incubation mixture containing 50 mM sodium acetate buffer, pH 4.5, 0.4 μM FRET substrate, 2.4 nM enzyme, 5% DMSO, and 0.05% Brij-35. The tested compounds were serially diluted in DMSO and pre-incubated with the substrate. The reaction was started by addition of enzyme, and the progress of the reaction was followed by measuring fluorescence with an excitation wavelength of 480 nm and an emission wavelength of 520 nm. Ten measurements were taken every 5-10 min, and the intensity of fluorescence was regressed against time in order to derive velocities of reaction in all 96 wells. |
| Affinity data for this assay | |
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