An antiphosphotyrosine antibody was used to identify proteins that are phosphorylated in Rous sarcoma virus-transformed chick embryo fibroblasts, and a 76-kD protein was obtained that localizes to focal adhesions at the ends of actin-containing stress fibers in nontransformed cells (Ref.1). This protein was purified from chicken gizzard smooth muscle, and was named Pxn (Paxillin) ('paxillus' means 'small stake' or 'peg' in Latin) as a protein tethered to the membrane at focal adhesions1) Davidson D, et al. (2001) EMBO J 20 (13): 3414-3426. Fleming I, et al. (1999) Proc Natl Acad Sci U S A 96 (3): 1123-1128. Goldberg MB. (2001) Microbiol Mol Biol Rev 65 (4): 595-626. Kook S, et al. (2000) Mol Biol Cell 11 (3): 929-939.
Immunogen
Paxillin (Phospho-Tyr31) antibody was raised against a peptide sequence around phosphorylation site of tyrosine 31 (T-P-Y (p) -S-Y) derived from Human Paxillin.