Application
Extracts of NIH3T3 cells untreated (1) or treated with 50ng/mL PDGF for 15 minutes (2-5) were resolved by SDS-PAGE on a 10% Tris-glycine gel and transferred to PVDF. The membrane was blocked with a 4% BSA-TBST buffer for one hour at room temperature, then incubated with the MEK1 [pT386] antibody in a 1% BSA-TBST buffer for two hours at room temperature, following prior incubation with: no peptide (1, 2), the non-phosphopeptide corresponding to the phosphopeptide immunogen (3), a generic phosphothreonine-containing peptide (4), or the phosphopeptide immunogen (5). After washing, the membrane was incubated with goat F(ab)2 anti-rabbit IgG HRP conjugate and signals were detected.The data show that only the phosphopeptide corresponding to MEK1 [pT386] blocks the antibody signal, demonstrating the specificity of the antibody. The data also show the upregulation of MEK1 [pT386] upon PDGF treatment in this cell system.