Rapid homogenous assay for protein kinase activity and high-throughput screen for kinase inhibitors. Key Features: Safe. Non-radioactive assay. Sensitive and accurate. As low as 0.01 U/L kinase can be quantified. Homogeneous and convenient. "Mix-incubate-measure" type assay. The whole assay involves adding a single working reagent and incubation for 10 min at room temperature. Robust and amenable to HTS: Assay can tolerate up to 300 µ M ATP and 10% dimethylsulfoxide (DMSO) . Z factors of > 0.6 are routinely observed in 96/384-well plates. Can be readily automated on HTS liquid handling systems for tens of thousands of assays per day. Method: FL530/585nm. Samples: All kinases. Species: All. Procedure: Assay takes 10 min. Kit size: 400 tests. Detection limit: 0.01 U/L.