{"product_id":"anti-caspr2-cntnap2-antibody-picoband-bha21005204","title":"Anti-Caspr2\/CNTNAP2 Antibody Picoband®","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eAnti-Caspr2\/CNTNAP2 Antibody Picoband® is an antibody reagent for detection of \u003cstrong\u003eCNTNAP2\u003c\/strong\u003e (protein inhibitor of activated STAT 3). Researchers commonly use anti-CNTNAP2 antibodies to measure relative expression and localization across biological samples, with assay selection guided by the listed applications (WB, IHC, Flow, ELISA).\u003c\/p\u003e\u003cp\u003eBoster Bio Anti-Caspr2\/CNTNAP2 Antibody Picoband® catalog # A02819-2. Tested in ELISA, WB applications. This antibody reacts with Human, Mouse, Rat. The brand Picoband indicates this is a premium antibody that guarantees superior quality, high affinity, and strong signals with minimal background in Western blot applications. Only our best-performing antibodies are designated as Picoband, ensuring unmatched performance.\u003c\/p\u003e\u003ch2\u003eKey elements and design rationale\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget:\u003c\/strong\u003e CNTNAP2 — Potassium\/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 (protein inhibitor of activated STAT 3). Alternative names: E3 SUMO-protein ligase PIAS3; Protein inhibitor of activated STAT protein 3; PIAS3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAntibody format:\u003c\/strong\u003e Polyclonal; Rabbit IgG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecies context:\u003c\/strong\u003e Host: Rabbit, Reactivity: Human,Mouse,Rat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurification:\u003c\/strong\u003e Immunogen affinity purified.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmunogen:\u003c\/strong\u003e E.coli-derived human Caspr2\/CNTNAP2 recombinant protein (Position: N363-E1159).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMolecular weight context:\u003c\/strong\u003e observed 170 kDa, calculated 96950 MW (reported)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProvided application(s):\u003c\/strong\u003e WB, IHC, Flow, ELISA\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese attributes help contextualize how the antibody is commonly selected (host\/clonality\/isotype\/label) and how signals are interpreted across sample types and assay formats.\u003c\/p\u003e\u003ch2\u003eBiological background\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eFunction:\u003c\/strong\u003e Functions as an E3-type small ubiquitin-like modifier (SUMO) ligase, stabilizing the interaction between UBE2I and the substrate, and as a SUMO-tethering factor. Plays a crucial role as a transcriptional coregulation in various cellular pathways, including the STAT pathway and the steroid hormone signaling pathway. Involved in regulating STAT3 signaling via inhibiting STAT3 DNA-binding and suppressing cell growth. Enhances the sumoylation of MTA1 and may participate in its paralog-selective sumoylation (PubMed:21965678, PubMed:9388184). Sumoylates CCAR2 which promotes its interaction with SIRT1 (PubMed:25406032). Diminishes the sumoylation of ZFHX3 by preventing the colocalization of ZFHX3 with SUMO1 in the nucleus (PubMed:24651376).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCellular localization:\u003c\/strong\u003e Cytoplasm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTissue details:\u003c\/strong\u003e Widely expressed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBackground:\u003c\/strong\u003e Contactin-associated protein-like 2 is a protein that in humans is encoded by the CNTNAP2 gene. This gene encodes a member of the neurexin family which functions in the vertebrate nervous system as cell adhesion molecules and receptors. This protein, like other neurexin proteins, contains epidermal growth factor repeats and laminin G domains. In addition, it includes an F5\/8 type C domain, discoidin\/neuropilin- and fibrinogen-like domains, thrombospondin N-terminal-like domains and a putative PDZ binding site. This protein is localized at the juxtaparanodes of myelinated axons, and mediates interactions between neurons and glia during nervous system development and is also involved in localization of potassium channels within differentiating axons. This gene encompasses almost 1.5% of chromosome 7 and is one of the largest genes in the human genome. It is ly bound and regulated by forkhead box protein P2, a transcription factor related to speech and language development. This gene has been implicated in multiple neurodevelopmental disorders, including Gilles de la Tourette syndrome, schizophrenia, epilepsy, autism, ADHD and intellectual disability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCross reactivity:\u003c\/strong\u003e No cross-reactivity with other proteins.\u003c\/p\u003e \u003ch2\u003eResearch relevance and current trends\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eQuantitative and spatial profiling: expression patterns are increasingly studied across cell states using multiplex imaging and omics-informed validation.\u003c\/li\u003e \u003cli\u003eIsoforms and post-translational modifications: researchers often evaluate how isoform composition and PTMs can shift apparent molecular weight or localization.\u003c\/li\u003e \u003cli\u003eContext-aware interpretation: comparative studies commonly include perturbations (stimulation, inhibition, genetic models) to relate target changes to pathway behavior.\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eCommon research applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWestern blot (WB):\u003c\/strong\u003e compare relative target abundance and apparent size shifts (e.g., isoforms\/PTMs) across conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImmunohistochemistry (IHC):\u003c\/strong\u003e assess distribution across tissue compartments and compare staining patterns between groups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow cytometry:\u003c\/strong\u003e quantify target-positive populations and compare shifts after stimulation or differentiation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAcross these uses, researchers typically interpret changes in signal as relative differences between matched sample groups, considering sample preparation and biological context.\u003c\/p\u003e \u003ch2\u003eNotes for experimental interpretation\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eApparent molecular weight can vary due to isoforms, proteolysis, glycosylation, phosphorylation, and sample preparation differences.\u003c\/li\u003e \u003cli\u003eSpecies reactivity and epitope conservation can influence observed signal patterns, especially in cross-species studies.\u003c\/li\u003e \u003cli\u003eControl concepts: include appropriate negative controls (e.g., isotype controls where relevant) and, when feasible, genetic or orthogonal controls (KO\/KD, peptide competition, or independent assays) to support interpretation.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFor antibody reagents, monoclonal antibodies are often chosen for epitope consistency across lots, while polyclonals may recognize multiple epitopes and can show different background characteristics depending on context.\u003c\/p\u003e \u003c!-- Sources (internal): - UniProt entry for CNTNAP2 (Q9UHC6) — UniProt Consortium — https:\/\/www.uniprot.org\/uniprotkb\/Q9UHC6 - Ensembl gene summary for CNTNAP2 — Ensembl — https:\/\/www.ensembl.org - HGNC gene symbol report for CNTNAP2 — HGNC — https:\/\/www.genenames.org - Antibody validation concepts (general) — NIH\/NCBI resources — https:\/\/www.ncbi.nlm.nih.gov --\u003e","brand":"Boster Bio","offers":[{"title":"100 ug\/vial \/ Unconjugated","offer_id":53068623315309,"sku":"A02819-2","price":370.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Biotin","offer_id":53069097632109,"sku":"A02819-2-Biotin","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Cy3","offer_id":53069097664877,"sku":"A02819-2-Cy3","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Fluoro488","offer_id":53069097697645,"sku":"A02819-2-Fluoro488","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Fluoro550","offer_id":53069097730413,"sku":"A02819-2-Fluoro550","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Fluoro594","offer_id":53069097763181,"sku":"A02819-2-Fluoro594","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ FITC","offer_id":53069097795949,"sku":"A02819-2-FITC","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ HRP","offer_id":53069097828717,"sku":"A02819-2-HRP","price":570.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ APC","offer_id":53069097861485,"sku":"A02819-2-APC","price":820.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ PE","offer_id":53069097894253,"sku":"A02819-2-PE","price":820.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Fluoro647","offer_id":53069097927021,"sku":"A02819-2-Fluoro647","price":670.0,"currency_code":"USD","in_stock":true},{"title":"100 ug\/vial \/ Carrier Free","offer_id":53069097959789,"sku":"A02819-2-carrier-free","price":370.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7424\/7277\/files\/a02819-2-cntnap2-primary-antibodies-wb-testing-1.jpg?v=1772611551","url":"https:\/\/www.ebiohippo.com\/products\/anti-caspr2-cntnap2-antibody-picoband-bha21005204","provider":"BioHippo","version":"1.0","type":"link"}