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Assay Method Information

Assay Name:  Inhibition Assay
Description:  Assays are performed in 96-well format in a final volume of 60 μL/well, containing 100 mM potassium phosphate, pH 7.4, 1% (v/v) DMSO, and additionally, 2 μM of corticosterone and 50 units of CYP11B2 activity. Reactions are started by the addition of NADPH to 1 mM and allowed to proceed for 90 minutes at 37 C. Reactions are terminated by the addition of 60 μL of MeCN containing an internal standard for mass spectrometry. One hundred microliters are then transferred to a glass filter plate and centrifuged at 570g for 5 minutes and the filtrate is collected. Reaction product aldosterone is quantified by mass spectrometry. To determine the assay blank value (0% activity), NADPH is omitted from some reactions.
Affinity data for this assay
 

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Last update November 1, 2007
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