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Assay Method Information

Assay Name:  In Vitro Inhibition Assay
Description:  The in vitro inhibition of recombinant human neutral endopeptidase (NEP, EC 3.424.11) can be determined as follows:Recombinant human neutral endopeptidase (expressed in insect cells and purified using standard methods, final concentration 7 pM) is pre-incubated with test compounds at various concentrations for 1 hour at room temperature in 10 mM sodium phosphate buffer at pH 7.4, containing 150 mM NaCl and 0.05% (w/v) CHAPS. The enzymatic reaction is started by the addition of a synthetic peptide substrate Cys(PT14)-Arg-Arg-Leu-Trp-OH to a final concentration of 0.7 uM. Substrate hydrolysis leads to an increase fluorescence lifetime (FLT) of PT14 measured by the means of a FLT reader as described by Doering et al. (2009). The effect of the compound on the enzymatic activity was determined after 1 hour (t=60 min) incubation at room temperature.
Affinity data for this assay
 

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Last update November 1, 2007
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