{"product_id":"fak-antibody-focal-adhesion-kinase-ptk2-bha17105527","title":"FAK Antibody \/ Focal Adhesion Kinase \/ PTK2","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eFAK Antibody \/ Focal Adhesion Kinase \/ PTK2 is a research-use-only Rabbit polyclonal (rabbit origin) Rabbit IgG directed against \u003cstrong\u003eFAK \/ Focal Adhesion Kinase \/ PTK2\u003c\/strong\u003e. It is supplied for interpretation-focused detection and comparative profiling in WB, IHC. \u003c\/p\u003e\n\u003ch2\u003eKey elements and design rationale\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget context:\u003c\/strong\u003e This antibody is raised against \u003cem\u003eAmino acids AHALAVDAKNLLDVIDQARLKMLGQTRPH of human PTK2\/FAK were used as the immunogen for the FAK antibody.\u003c\/em\u003e. Epitope context matters because isoforms, processing, and post-translational modifications can change what is accessible in a given assay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e Antigen affinity purified. Format influences background and compatibility with different detection chemistries; conjugated formats (when present) can simplify multiplexing and reduce reliance on secondary reagents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecies reactivity:\u003c\/strong\u003e Human, Mouse, Rat. Cross-species performance can vary with sequence divergence and epitope conservation, so interpretation should be anchored with appropriate biological controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e WB, IHC. These indicate assay contexts where the antibody is commonly applied; actual performance depends on sample type and processing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLimitations:\u003c\/strong\u003e This FAK antibody is available for research use only.. Consider these constraints when selecting controls and when comparing results across sample matrices.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePolyclonal reagents can differ in how they recognize epitope features. Monoclonal antibodies often provide more consistent epitope targeting across lots, while polyclonal preparations may broaden recognition across related epitope variants. \u003c\/p\u003e\n\u003ch2\u003eBiological background\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eFAK \/ Focal Adhesion Kinase \/ PTK2\u003c\/strong\u003e refers to the gene\/protein target stated in the product record. Protein targets can exhibit context-dependent expression, regulated turnover, isoform diversity, and post-translational modifications that affect apparent molecular weight and epitope accessibility. For curated functional annotation, sequence features, and expression context, consult \u003ca href=\"https:\/\/www.uniprot.org\/uniprotkb\/Q05397\/entry\"\u003eUniProtKB Q05397\u003c\/a\u003e, \u003ca href=\"https:\/\/www.ensembl.org\/\"\u003eEnsembl\u003c\/a\u003e, and \u003ca href=\"https:\/\/www.proteinatlas.org\/\"\u003eHuman Protein Atlas\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eResearch relevance and current trends\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIntegrating antibody-based detection with single-cell and spatial atlasing efforts to connect RNA programs with protein-level abundance and localization in defined cell states.\u003c\/li\u003e\n\u003cli\u003eExpanding multiplexed imaging and high-content screening, where reagent specificity, cross-reactivity risk, and channel design (including direct conjugates) become central to interpretation.\u003c\/li\u003e\n\u003cli\u003eGrowing emphasis on reproducibility and application-specific validation frameworks (e.g., genetic perturbation controls, orthogonal measurements, and independent antibody strategies) when drawing mechanistic conclusions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCommon research applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWestern blot (WB):\u003c\/strong\u003e commonly used to compare relative abundance\/size (e.g., band intensity or mobility shifts) between conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmunohistochemistry (IHC):\u003c\/strong\u003e commonly used to compare tissue- and cell-type–specific expression patterns in situ.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eInterpretation typically focuses on relative differences (presence\/absence, fold-changes, compartment shifts, or population-level shifts) rather than absolute quantitation. When signal changes are observed, they may reflect altered expression, altered localization\/trafficking, changes in modification state, or differences in sample composition; orthogonal readouts and appropriate controls help distinguish these possibilities.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplication details (record-specific):\u003c\/strong\u003e Western blot: 0.5-1ug\/ml,Immunohistochemistry (FFPE): 2-5ug\/ml\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplication notes (record-specific):\u003c\/strong\u003e Optimal dilution of the FAK antibody should be determined by the researcher.\u003c\/p\u003e\n\u003ch2\u003eNotes for experimental interpretation\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct description (record-specific):\u003c\/strong\u003e PTK2 protein tyrosine kinase 2 (PTK2), also known as Focal Adhesion Kinase (FAK), is a protein that, in humans, is encoded by the PTK2 gene. This gene encodes a cytoplasmic protein tyrosine kinase which is found concentrated in the focal adhesions that form between cells growing in the presence of extracellular matrix constituents. The encoded protein is a member of the FAK subfamily of protein tyrosine kinases but lacks significant sequence similarity to kinases from other subfamilies. Activation of this gene may be an important early step in cell growth and intracellular signal transduction pathways triggered in response to certain neural peptides or to cell interactions with the extracellular matrix. Several transcript variants encoding different isoforms have been found for this gene, but the full-length natures of only three of them have been determined.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotential confounders:\u003c\/strong\u003e isoforms, proteolytic processing, and PTMs can change epitope presentation and apparent size; fixation\/denaturation state can also expose or mask epitopes. Species differences near the epitope may affect cross-reactivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl concepts:\u003c\/strong\u003e include genetic perturbation (KO\/KD) or overexpression comparisons, orthogonal measurement (e.g., transcript or proteomics), and independent antibody\/epitope strategies. For conjugated reagents, include staining-only\/background controls appropriate to the detection chemistry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eImmunogen\/epitope context is described as: \u003cem\u003eAmino acids AHALAVDAKNLLDVIDQARLKMLGQTRPH of human PTK2\/FAK were used as the immunogen for the FAK antibody.\u003c\/em\u003e. Monoclonal and polyclonal formats differ in epitope breadth; this can influence sensitivity to sequence variants, isoforms, or PTM-dependent recognition.\u003c\/p\u003e\n\u003c!-- Sources (internal):\n- UniProtKB entry Q05397 (UniProt Consortium): https:\/\/www.uniprot.org\/uniprotkb\/Q05397\/entry\n- Ensembl genome browser (EMBL-EBI \/ Wellcome Sanger): https:\/\/www.ensembl.org\/\n- The Human Protein Atlas (KTH \/ SciLifeLab): https:\/\/www.proteinatlas.org\/\n- A proposal for validation of antibodies (Uhlén et al., Nature Methods, 2016): https:\/\/www.nature.com\/articles\/nmeth.3995.pdf\n- Getting to reproducible antibodies: the rationale for sequenced recombinant characterized reagents (Bradbury \u0026 Plückthun, PEDS, 2015): https:\/\/academic.oup.com\/peds\/article\/28\/10\/303\/1478378\n- Standardize antibodies used in research (Bradbury, Plückthun et al., Nature, 2015): https:\/\/www.nature.com\/articles\/518027a.pdf\n--\u003e","brand":"NSJ Bioreagents","offers":[{"title":"0.5mg\/ml if reconstituted with 0.2ml sterile DI water \/ 100 ug","offer_id":53210360840557,"sku":"R32191","price":462.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7424\/7277\/files\/get_image_2fc2d1db-4dbc-41f1-bc24-df94ad53bf9e.jpg?v=1775785706","url":"https:\/\/www.ebiohippo.com\/products\/fak-antibody-focal-adhesion-kinase-ptk2-bha17105527","provider":"BioHippo","version":"1.0","type":"link"}