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Assay Method Information

Assay Name:  Kinase Activity Assay
Description:  TrkA kinase activity was measured as the ability of the enzyme to phosphorylate a fluorescently labeled peptide substrate. Buffer salts, reagents, and fluorescently labeled peptides were purchased from Carna Biosciences and were of the highest quality available (QSS Assist TRKA_MSA Kit). Enzyme was purchased from Cell Signaling, and was used without further purification. 384-well round bottom assay plates were prepared by the addition of 200 nl of a DMSO solution of compound at various concentrations to final inhibitor concentrations ranging from 100 μM to 0.2 μM. Next, assay buffer (10 μl) containing substrate and ATP were added, followed by addition of 10 μl of enzyme in assay buffer. Final assays concentrations were: [E]=0.37 nM, [S]=1 μM, [ATP]=2 mM. The reactions were incubated at room temperature for 3 hours resulting in approximately 15% substrate phosphorylation and were terminated by the addition of 5 μl of stop buffer.
Affinity data for this assay
 

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Last update November 1, 2007
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