Mouse Contactin-4 Antibody

  
  • Species Reactivity
    Mouse
  • Specificity
    Detects mouse Contactin-4 in direct ELISA and Western blot. In direct ELISAs, approximately 35% cross-reactivity with recombinant human (rh) Contactin-4 is observed and less than 1% cross-reactivity with rhContactin-5, recombinant mouse (rm) Contactin-3 and rmContactin-6 is observed.
  • Source
    Polyclonal Sheep IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    Chinese hamster ovary cell line CHO-derived recombinant mouse Contactin-4
    Asp19-Gly999 (Ile64Leu)
    Accession # Q69Z26
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    2 µg/mL
    See below
  • Immunohistochemistry
    5-15 µg/mL
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Detection of Mouse Contactin‑4 by Western Blot. Western blot shows lysates of mouse brain (cortex) tissue. PVDF Membrane was probed with 2 µg/mL of Sheep Anti-Mouse Contactin‑4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5495) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). Specific bands were detected for Contactin‑4 at approximately 135 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Immunohistochemistry
Contactin‑4 in Mouse Brain. Contactin‑4 was detected in perfusion fixed frozen sections of mouse brain (15 d.p.c.) using Sheep Anti-Mouse Contactin‑4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5495) at 15 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Sheep HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS019) and counterstained with hematoxylin (blue). Specific staining was localized to neuronal processes. View our protocol for Chromogenic IHC Staining of Frozen Tissue Sections.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.2 mg/mL.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Contactin-4

Contactin-4 (CNTN4), also known as BIG-2 (brain-derived immunoglobulin superfamily molecule 2), is an axonal cell adhesion molecule (AxCAM) that belongs to the contactin family, a subfamily of the Ig superfamily (1, 2). The contactin family comprises six members (CNTN1/F3, CNTN2/TAG-1, CNTN3/BIG-1, CNTN4/BIG-2, CNTN5/NB-2 and CNTN6/NB-3) that are characterized by the presence of six Ig like domains, four fibronectin type III-like repeats, and a glycosylphosphatidylinositol (GPI)-anchoring domain (1‑4). Contactins are membrane-anchored proteins that can be released as soluble proteins by GPI-specific phospholipase D and are able to promote neurite outgrowth in their soluble form (2). Potential 1026, 705, and 498 amino acid (aa) isoforms of mouse CNTN4 have been described (1, 5). Only the longest isoform includes the C-terminal GPI anchoring sequence. It shares 97% aa identity with rat and 95% aa identity with human, equine and bovine CNTN4 in its mature 981 aa form. It also shares 42‑64% aa identity with other CNTN family members, showing highest identity with CNTN3. CNTN4 is expressed throughout the brain, but minor amounts are also detected in small intestine, thyroid, uterus and testis (2, 4). Family members display overlapping but distinct expression patterns in rat brain and are suggested to influence the formation and maintenance of specific neuronal networks (2). In the olfactory bulb, CNTN4 is expressed in specific sensory neurons in a mosaic pattern that is closely correlated with odorant receptor choice, and is thought important for odor mapping (6, 7). In humans, disruption of CNTN4 has been implicated in the 3p deletion syndrome characterized by developmental and growth delay, and in autism spectrum disorder (8‑10).

  • References:
    1. Mimmack, M. L. et al. (1997) Brain Res. Mol. Brain Res. 47:345.
    2. Yoshihara, Y. et al. (1995) J. Neurobiol. 28:51.
    3. Ogawa, J. et al. (1996) Neurosci. Lett. 218:173.
    4. Hansford, L.M. et al. (2003) Cytogenet. Genome Res. 101:17.
    5. Swissprot Accession #Q69Z26.
    6. Saito, H. et al. (1998) Brain Res. Dev. Brain Res. 110:69.
    7. Kaneko-Goto, T. et al. (2008) Neuron 57:834.
    8. Fernandez, T. et al. (2004) Am. J. Hum. Genet. 74:1286.
    9. Fernandez, T. et al. (2008) Am. J. Hum. Genet. 146A:2746.
    10. Roohi, J. et al. (2008) J. Med Genet. doi:10.1136/jmg.2008.057505.
  • Entrez Gene IDs:
    152330 (Human)
  • Alternate Names:
    AXCAM; axonal-associated cell adhesion molecule; BIG-2; BIG-2Brain-derived immunoglobulin superfamily protein 2; CNTN4; contactin 4; Contactin4; Contactin-4; MGC33615; neural cell adhesion protein BIG-2
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