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Assay Method Information

Assay Name:  Electrophoretic Mobility Shift Assay (EMSA)
Description:  STAT proteins were expressed in Sf9 cells from a baculovirus encoding the recombinant protein. A nuclear extract of the Sf9 cells was incubated with 32P-labeled high affinity c-fos sis inducible element (hSIE) either alone or in the presence of inhibitor. After incubation, samples were electrophoresed on polyacrylamide gels. The gels were dried, exposed to a phosphorimager screen and scanned. IC50 values were derived from plots of spot intensity versus phosphopeptide concentration. The affinity of peptides to the SH2 domain is measured by the intensity of the radioactivity of the Stat-DNA complex band in the electrophoresis gel.
Affinity data for this assay
 

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Last update November 1, 2007
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