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Assay Method Information |
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| | Competition Binding Assay (ATP 70 uM) |
| Description: | Compounds were tested using an 11-point curve with 3-fold serial dilutions. IC50 determinations were made using an ATP concentration of 70 uM. The highest concentration tested was 30 μM. Test compounds were prepared in 100% DMSO at 100x final test concentration and were diluted to 1x in the assay with a final DMSO concentration of 1%.Streptavidin-coated magnetic beads were treated with biotinylated small molecule ligands for 30 min at RT to generate affinity resins for kinase assays. The ligand-bound beads were blocked with excess biotin and washed with blocking buffer (SeaBlock (Pierce), 1% BSA, 0.05% Tween 20, 1 mM DTT) to remove unbound ligand and to reduce non-specific binding. Binding reactions were assembled by combining kinases, ligand-bound affinity beads, and test compounds in 1x binding buffer (20% SeaBlock, 0.17?PBS, 0.05% Tween 20, 6 mM DTT). All reactions were performed in polystyrene 96-well plates in a final volume of 0.135 mL. The assay plates were incubated at RT with shaking for 1 hr. The affinity beads were washed with wash buffer (1xPBS, 0.05% Tween 20). The beads were then re-suspended in elution buffer (1xPBS, 0.05% Tween 20, 0.5 μM non-biotinylated affinity ligand) and incubated at RT with shaking for 30 min. The kinase concentration in the eluates was measured by qPCR. |
| Affinity data for this assay | |
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