| Assay Method Information | |
| | In Vitro Inhibition Assay |
| Description: | The assay protocol employed was a modified version of that described in Li et al., 2000, Proc. Nat'l Acad. Sci. USA 97:6183-643, incorporated herein by reference. Briefly, recombinant peptide substrate was incubated with γ-secretase (40 μg/ml) in the presence or absence of test compound. The reaction mixture contained 0.25% CHAPSO, 0.1 μg/μl BSA, protease inhibitor, 50 mM PIPES, pH 7.0, 5 mM MgCl2, 5 mM CaCl2 and 150 mM KCl. The reaction was incubated for 2.5 hr at 37° C. and stopped by adding RIPA buffer (150 mM NaCl, 1.0% NP-40, 0.5% sodium deoxycholate, 0.1% SDS, 50 mM Tris HCl, pH 8.0). The products were detected with various antibody combinations using electrochemiluminescence (ECL) technology as previously described in Li et al., 2000, Proc. Nat'l Acad. Sci. USA 97:6183-643; Lai et al., 2003, J. Biol. Chem. 278: 22475-22481; and Yin et al., 2007, J. Biol. Chem. 282:23639-23644. |
| Affinity data for this assay | |
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