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Assay Method Information

Assay Name:  Assays for Inhibition of GRKs
Description:  GRK1, 2 and 5 kinetic assays were conducted in a buffer containing 20 mM HEPES pH 7.0, 5 μM ATP, 2 mM MgCl2, and 0.025% DDM with 50 nM GRK and either 500 nM bROS or 500 nM soluble substrate tubulin in 5 min reactions. The low salt concentration and DDM were used to maximize GRK activity and disrupt small molecule aggregates from forming, respectively. Reactions were quenched with SDS loading buffer, separated via SDS-PAGE, dried and exposed with a phosphorimaging screen prior to quantification via Typhoon imager, as previously reported (see Thal et al., ACS Chemical Biology 7(11):1830-1839 (2012)). Data was analyzed and inhibition curves were fit via GraphPad Prism.
Affinity data for this assay
 

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Last update November 1, 2007
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