Electrophoretic Mobility Shift Assay Using Radiolabeled DNA Probes

Electrophoretic mobility shift assays (EMSA) have proven their usefulness for studying interactions between biological molecules. In the present protocol, a purified protein of interest is mixed with a 5′-end radiolabeled DNA probe. The bound complexes are separated by electrophoretic migration through a polyacrylamide gel and detected with a phosphorimager. The applications of EMSA are diverse, from thermodynamic and kinetic analyses to observation of bending and other conformational changes, stoichiometric inferences, or insights into cooperative protein binding.

Source: Springer protocols feed by Genetics/Genomics - September 15, 2015 Category: Genetics & Stem Cells Source Type: news