WB analysis of Integrin beta 1-deficient fibroblasts expressing wild type (Lane 1-5, 7) or serine-785-alanine mutant (S785A: Lane 6, 8) chicken Integrin beta 1 using GTX25185 Integrin beta 1 / CD29 (phospho Ser785) antibody. The data show that only the immunogen phosphopeptide blocks the signal, demonstrating the specificity of the antibody.