Assay Method Information

Assay Name:  Radioligand Binding Assay
Description:  DHCR7: The radioligand binding assay was prepared by adding assay buffer diluted hEBP-DHCR7 membrane at 66.7 μg/ml×150 μl/well into the 96-well compound plate to reach 10 μg membrane per well. Then, the assay buffer diluted [3H]—(S)-6-(2-Methyl-3-(6-(trifluoromethyl)pyridin-3-yl)propyl)-2-thia-6-azaspiro[3.4] octane 2,2-dioxide was added at 25 nM×50 μl/well. Following this, the plate was centrifuged at 1000 rpm for 30 secs. The plate was then sealed and agitated at 600 rpm at 22° C. for 5 min, and then incubated at 22° C. for 3 hrs. The incubation was stopped by transferring the binding solution to the pre-treated UniFilter-96 GF/B plate, vacuum filtrated, and then washed four times with ice-cold assay buffer. Following this, the plates were dried at 37° C. for 45 min. The plates were then sealed at the bottom. 40 μl/well of scintillation cocktail was added to the plates. A MicroBeta2 microplate counter was then used to read the plate and analyze the data. For reference and test compounds, the results are expressed as % Inhibition, using the normalization equation: N=100−100×(U−C2)/(C1−C2), where U is the unknown value, C1 is the average of high controls, and C2 is the average value of low controls.
Affinity data for this assay
 

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