| Assay Method Information | |
| | In Vitro Kinase Inhibition Assay |
| Description: | Enzymes (from Upstate) were prepared at 2× final concentration in 1× kinase assay buffer (Table 1). Enzymes were then incubated with test compounds, biotinylated Flt3 substrate (biotin −DNEYFYV) (Cell Signalling Technology Inc.) and ATP. The reaction was allowed to proceed for 3 hours (FGFR3) or 2.5 hrs (PDGFR-beta) at room temperature on a plate shaker at 900 rpm before being stopped with 20 μl of 35 mM EDTA, pH 8 (FGFR3) or 55 mM EDTA, pH 8 (PDGFR-beta). Twenty pl of 5× detection mix (50 mM HEPES pH 7.5, 0.1% BSA, 2 nM Eu-anti-pY (PY20) (PerkinElmer) 15 nM SA-XL665 (Cisbio) for FGFR3 and 50 mM HEPES, pH 7.5, 0.5 M KF, 0.1% BSA, 11.34 nM Eu-anti-pY (PT66) (PerkinElmer), 94 nM SA-XL665 (Cisbio) for PDGFR-beta) was then added to each well and the plate sealed and incubated at room temperature for one hour on a plate shaker at 900 rpm. The plate was then read on a Packard Fusion plate reader in TRF mode. Kinase Assay buffers were:A: 50 mM HEPES pH 7.5, 6 mM MnCl2, 1 mM DTT, 0. |
| Affinity data for this assay | |
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