WB analysis of HeLa cells treated with 100 ng/mL Taxol for 24 hours using GTX24790 FAK (phospho Ser722) antibody prior incubated with the non-phosphopeptide corresponding to the phosphopeptide immunogen (Lane 2), a generic phosphoserine-containing peptide (Lane 3), or the phosphopeptide immunogen (Lane 4). The data show that only the immunogen phosphopeptide blocks the signal, demonstrating the specificity of the antibody. The membrane treated with phosphatase (Lane 5) eliminates the signal further verifying that the antibody is phospho-specific.