• Product nameAnti-FAK (phospho Y576) antibody
    See all FAK primary antibodies
  • Description
    Rabbit polyclonal to FAK (phospho Y576)
  • SpecificityThis antibody detects endogenous levels of FAK only when phosphorylated at tyrosine 576.
  • Tested applicationsSuitable for: IHC-P, ELISA, WBmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthesized phosphopeptide derived from human FAK around the phosphorylation site of tyrosine 576 (S-T-YP-Y-K).

  • Positive control
    • WB: Extracts from NIH/3T3 cells IHC-P: human brain tissue.


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Our Abpromise guarantee covers the use of ab55335 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
IHC-P Use at an assay dependent concentration.
ELISA 1/5000.
WB Use at an assay dependent concentration. Detects a band of approximately 116 kDa (predicted molecular weight: 119 kDa).


  • FunctionNon-receptor protein-tyrosine kinase implicated in signaling pathways involved in cell motility, proliferation and apoptosis. Activated by tyrosine-phosphorylation in response to either integrin clustering induced by cell adhesion or antibody cross-linking, or via G-protein coupled receptor (GPCR) occupancy by ligands such as bombesin or lysophosphatidic acid, or via LDL receptor occupancy. Microtubule-induced dephosphorylation at Tyr-397 is crucial for the induction of focal adhesion disassembly. Plays a potential role in oncogenic transformations resulting in increased kinase activity.
  • Tissue specificityExpressed in all organs tested, in lymphoid cell lines, but most abundantly in brain.
  • Sequence similaritiesBelongs to the protein kinase superfamily. Tyr protein kinase family. FAK subfamily.
    Contains 1 FERM domain.
    Contains 1 protein kinase domain.
  • DomainThe first Pro-rich domain interacts with the SH3 domain of CRK-associated substrate (BCAR1) and CASL.
    The carboxy-terminal region is the site of focal adhesion targeting (FAT) sequence which mediates the localization of FAK1 to focal adhesions.
  • Post-translational
    Phosphorylated on 6 tyrosine residues upon activation. Microtubule-induced dephosphorylation at Tyr-397 could be catalyzed by PTPN11 and regulated by ZFYVE21. Dephosphorylated by PTPN11 upon EPHA2 activation by its ligand EFNA1.
  • Cellular localizationCell junction > focal adhesion. Cell membrane. Constituent of focal adhesions.
  • Information by UniProt
  • Database links
  • Alternative names
    • FADK 1 antibody
    • FADK antibody
    • FAK related non kinase polypeptide antibody
    • FAK1 antibody
    • FAK1_HUMAN antibody
    • Focal adhesion kinase 1 antibody
    • Focal adhesion Kinase antibody
    • Focal adhesion kinase isoform FAK Del33 antibody
    • Focal adhesion kinase related nonkinase antibody
    • FRNK antibody
    • p125FAK antibody
    • pp125FAK antibody
    • PPP1R71 antibody
    • Protein phosphatase 1 regulatory subunit 71 antibody
    • Protein tyrosine kinase 2 antibody
    • Protein-tyrosine kinase 2 antibody
    • Ptk2 antibody
    • PTK2 protein tyrosine kinase 2 antibody
    see all

Anti-FAK (phospho Y576) antibody images

  • ab55335, at 1/50 dilution, staiing FAK in paraffin embedded human brain tissue by Immunohistochemsitry in the absence (left image) or presence (right image) of the immunising phosphopeptide.
  • All lanes : Anti-FAK (phospho Y576) antibody (ab55335) at 1/500 dilution

    Lane 1 : Extracts from NIH/3T3 cells
    Lane 2 : Extracts from NIH/3T3 cells with the immunising phosphopeptide.

    Predicted band size : 119 kDa
    Observed band size : 116 kDa (why is the actual band size different from the predicted?)

References for Anti-FAK (phospho Y576) antibody (ab55335)

This product has been referenced in:
  • Herold CI  et al. Phase II trial of dasatinib in patients with metastatic breast cancer using real-time pharmacodynamic tissue biomarkers of Src inhibition to escalate dosing. Clin Cancer Res 17:6061-70 (2011). IHC-P ; Human . Read more (PubMed: 21810917) »

See 1 Publication for this product

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