The ProFluor® Src-Family Kinase Assay measures the activity of purified Src-family tyrosine kinases (Src, Lck, Lyn, Fyn, Hck tested) in a multiwell plate format involves "add-mix-read" steps only—ideal for high-throughput applications. The assay begins with a standard kinase reaction performed with a provided Src-family kinase bisamide rhodamine 110 peptide substrate. Following the kinase reaction, a termination buffer containing a protease reagent is added, which simultaneously stops the kinase reaction removes amino acids specifically from the nonphosphorylated substrate, liberating highly fluorescent rhodamine 110. Phosphorylated substrate, however, is resistant to digestion by the protease reagent remains nonfluorescent. Thus, fluorescence intensity measured in this assay is inversely correlated with kinase activity. A control peptide (AAF-AMC) is included to control for compounds that may inhibit the protease. The assay produces excellent Z´ values (>0.7) in either 96- 384-well plate formats easily distinguishes known Src-family kinase inhibitors from other compounds.
For more information, see the Protocols & Applications Guide.
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