Application
Mouse embryonic fibroblasts stained with anti-MEK1⁄2 [pS222] . The cell is actively dividing. Blue represents chromosomes in anaphase of mitotic cell division. Green shows mitotic spindle expressing phosphorylated MEK1⁄2.
Application
Extracts prepared from NIH3T3 cells left untreated (lane 1) or treated (lanes 2-5) with PDGF were resolved by SDS-PAGE on a 10% Tris-glycine gel and transferred to nitrocellulose. Membranes were blocked with a 5% BSA-TBST buffer overnight at 4 degree C, then incubated with MEK1 +MEK2 antibody.
Application
Extracts of NIH3T3 cells untreated (lane 1) or treated with 50 ng/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 overnight at 4°C, then incubated with the MEK1&2 [pS222] antibody for two hours at room temperature in a 1% BSA-TBST buffer, following prior incubation with: no peptide (1, 2), the non-phosphopeptide corresponding to the phosphopeptide immunogen (3), a generic phosphoserine-containing peptide (4), or the phosphopeptide immunogen (5). After washing, the membrane was incubated with goat F(ab)2 anti-rabbit IgG alkaline phosphatase and signals were detected. The data show that only the phosphopeptide corresponding to MEK1&2 [pS222] block the antibody signal, demonstrating the specificity of the antibody. The data also show the induction of MEK1&2 [pS222] phosphorylation by the addition of PDGF to this cell system.