Application
Extracts of A431 cells unstimulated (1) or stimulated with 200 ng/mL EGF for 15 minutes (2-5), were probed with the EGFR [pY1068] antibody following prior incubation with: no peptide (1 and 2), the non-phosphopeptide corresponding to the phosphopeptide immunogen (3), a generic phosphotyrosine-containing peptide (4) or the phosphopeptide immunogen (5). The data show that only the phosphopeptide corresponding to EGFR [pY1068] blocks the antibody signal, demonstrating the specificity of the antibody. The data also show the induction of EGFR [pY1068] phosphorylation by the addition of EGF to this cell system.