Application
Lysates prepared from COS cells overexpressing human wild-type PAG3 alone (1) cotransfected with human wild-type PAG3 and mouse Pyk2 (2-5), or mutant [Y724F/Y763F] PAG3 and mouse Pyk2 (6) were resolved by SDS-PAGE on an 8% polyacrylamide gel and transferred to PVDF. Membranes were blocked with a 5% BSA-TBST buffer for one hour at room temperature, then incubated with PAG3 [pY724] antibody for two hours at room temperature in a 3% BSA-TBST buffer, following prior incubation with: no peptide (1, 2, 6), the non-phosphopeptide corresponding to the immunogen (3), a generic phosphotyrosine-containing peptide (4), or, the phosphopeptide immunogen (5). After washing, membranes were incubated with goat F(ab)2 anti-rabbit IgG HRP conjugate in 3% BSA-TBST buffer, and bands were detected. The data show that only the peptide corresponding to PAG3 [pY724] blocks the signal, and the signal is absent in the mutant extracts, demonstrating the specificity of the antibody.