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The Thermofluor assay, also referred to as a thermal shift assay or differential scanning fluorescence (DSF), is a fast and simple method that is based upon high-throughput measurements of protein stability. The Thermofluor method can be performed on nearly all qPCR machines, meaning no special instrumentation is necessary, and can be used to validate the quality of protein preparations, screen for ligands or cofactors, and discover buffers and additives that maximize protein stability.
(Phillips and de la Pena 2011) The combined use of the Thermofluor assay and ThermoQ analytical software for the determination of protein stability and buffer optimization as an aid in protein crystallization. Curr Protoc Mol Biol.