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Assay Method Information

Assay Name:  IDH1-R132H and IDH1-R132C Enzymatic Assay
Description:  Assays were performed in a 384-well black plate. An aliquot of 250 nL of compound was incubated with 10 μL of 30 nM IDH1-R132H or 10 nM IDH1-R132C recombinant protein in assay buffer (50 mM Tris pH=7.5, 150 mM NaCl, 5 mM MgCl2, 0.1% (w/v) Bovine Serum Albumin, and 0.01% Triton X-100) in each well at 25 C. for 15 minutes. After the plate was centrifuged briefly, an aliquot of 10 μL of 2 mM α-ketoglutarate and 20 μM NADPH solution prepared in assay buffer was then added to each well and the reaction was maintained at 25 C. for 45 minutes. An aliquot of 10 μL of diaphorase solution (0.15 U/mL diaphorase and 30 μM Resazurin in assay buffer) was added to each well. The plate was maintained at 25 C. for 15 minutes and then read on a plate reader with excitation and emission wavelengths at 535 nm and 590 nm, respectively. The IC50 of a given compound was calculated by fitting the dose response curve of inhibition of NADPH consumption at a given concentration with the four parameter logistic equation.
Affinity data for this assay
 

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Last update November 1, 2007
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