Abstract
Here, we describe a detailed step-by-step protocol for the detection of phosphoproteins in two-dimensional difference gel electrophoresis (2D-DIGE) gels. A standard 2D-DIGE protocol is combined with subsequent post-staining with phosphospecific fluorescent dye. The combination of these two methods complements 2D-DIGE-based proteome profiling by fluorescence detection of phosphoproteins in the same gel providing additional possibility for sensitive and accurate quantification of the differentially regulated phosphoproteins in biological samples.
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