Human Contactin-4 Antibody

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Product Details
Supplemental Products

Human Contactin-4 Antibody Summary

Species Reactivity
Detects human Contactin-4 in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human Contactin-2, -5, or recombinant mouse Contactin-3 is observed.
Monoclonal Mouse IgG2B Clone # 296015
Protein A or G purified from hybridoma culture supernatant
Mouse myeloma cell line NS0-derived recombinant human Contactin-4 isoform 1
Accession # Q8IWV2
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.


Recommended Concentration
Western Blot
1 µg/mL
Recombinant Human Contactin‑4 (Catalog # 2205-CN)

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.

Reconstitution Calculator

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Preparation and Storage

Reconstitute at 0.5 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
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 that belongs to the contactin family, a subfamily of the Ig superfamily (1‑3). The contactin family comprises six members (CNTN1/F3, CNTN2/TAG-1, CNTN3/BIG-1, CNTN4/BIG-2, CNTN5/NB-2 and CNTN6/NB-3) and are characterized by the presence of six Ig-like domains, four fibronectin type III-like repeats, and a glycosylphosphatidylinositol (GPI)‑anchoring domain. Contactin family proteins exist as membrane-bound proteins, but can also be released as soluble proteins by GPI‑specific phospholipase D. Soluble Contactins are functionsl proteins that are able to promote neurite outgrowth. Human CNTN4 has been mapped to chromosome 3p26‑p25. Three alternative transcripts of CNTN4, encoding isoforms a, b, and c precursor proteins containing 1026, 282, and 698 amino acid (aa) residues, respectively, have been described. Human CNTN4 isoform a shares 94% aa sequence identity with its rat homolog. It also shares from 44‑66% aa sequence identity with other CNTN family members. CNTN family members display overlapping but distinct expression patterns. CNTN4 expression is detected in multiple organs including brains, pancreas, kidney, aorta, small intestine, thyroid, uterus and testis. However, expression of the 282 aa isoform b is primarily restricted to the brain. CNTN4 has been suggested to play important roles in the formation of neuronal networks during nervous sytems development. Disruption of CNTN4 has been implicated in the 3p deletion syndrome characterized by growth failure, developmental delay, and mental retardation. CNTN-4 expression is induced in human neuroblastoma tumor cells treated with retinoic acid and may be responsible for the the neuritogenic response of tumor cells to retinoids.

  1. Fernandez, T. et al. (2004) Am. J. Genet. 74:1286.
  2. Hasnford, L.M. et al. (2003) Cytogenet. Genome Res. 101:17.
  3. Yoshihara, Y. et al. (1995) J. Neurobiology 28:51.
Entrez Gene IDs
152330 (Human); 269784 (Mouse)
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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Isotype Controls

Reconstitution Buffers

Secondary Antibodies

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