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Assay Method Information |
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| | Kinase Assay |
| Description: | Kinase reactions consisted of 5 ng of JAK3 enzyme, 30 uM CSKtide substrate, 0.2 uCi gamma-33P ATP, 8 uM ATP in 30 ul kinase buffer (50 mM Hepes, pH 8.0, 10 mM MgCl2, 1 mM EGTA, 2 mM DTT). Reactions were incubated for 30 minutes at room temperature and stopped by the addition of cold trichloroacetic acid (TCA) to a final concentration of 15%. TCA precipitates were collected onto 384 well phosphocellulose filters (Millipore) using a Platemate to transfer the reaction mixture, washed on an EMBLA plate washer and the filters were quantitated using a TopCount 384-well liquid scintillation counter. Dose response curves were generated to determine the concentration required inhibiting 50% of kinase activity (IC50). Compounds were dissolved at 10 mM in dimethylsulfoxide (DMSO) and evaluated at six concentrations, each in triplicate. The final concentration of DMSO in the assay equaled 2%. |
| Affinity data for this assay | |
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