| Assay Method Information | |
| | Caliper Assay |
| Description: | A selection of compounds was screened against a selected panel of kinases based on single point inhibitory ability to determine absolute inhibitory activity, leading to selectivity measurements. The assay utilized was identical to that of the single point inhibitory activity determination (MSA) but run in dose response. A solution of 4× inhibitor (5 μL), 4× substrate/ATP Metal solution (5 μL), and 2× Kinase solution (10 μL) was prepared with assay buffer (20 mM HEPES, 0.01% Triton X-100, 2 mM DTT, pH 7.5) and mixed/incubated in 384 well plates for 1 or 5 hours depending on the kinase, at room temperature. A solution of termination buffer (QuickScout Screening assist MSA; Carna Biosciences) (60 μL) was added to each well. The entire reaction mixture was then applied to a LabChip3000 system (Caliper Life Science) and the product and substrate peptide peaks were separated and quantified. Evaluation of kinase activity was then determined based on ratio of calculated peak heights of product (P) and substrate (S) peptides (P/(P+S)). |
| Affinity data for this assay | |
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