Human Caspr1 Antibody

Catalog # Availability Size / Price Qty
Caspr1 in IMR32 Human Cell Line.
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Product Details
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Human Caspr1 Antibody Summary

Species Reactivity
Detects human Caspr1 in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human Caspr2 is observed.
Monoclonal Mouse IgG2A Clone # 753232
Protein A or G purified from hybridoma culture supernatant
Chinese hamster ovary cell line CHO-derived recombinant human Caspr1
Accession # P78357
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
8-25 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 Example

Immunocytochemistry Caspr1 antibody in IMR32 Human Cell Line by Immunocytochemistry (ICC). View Larger

Caspr1 in IMR32 Human Cell Line. Caspr1 was detected in immersion fixed IMR32 human neuroblastoma cell line using Mouse Anti-Human Caspr1 Monoclonal Antibody (Catalog # MAB7548) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Mouse IgG Secondary Antibody (red; Catalog # NL007) and counterstained with DAPI (blue). Specific staining was localized to cell surfaces and cytoplasm. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Sterile PBS to a final concentration of 0.5 mg/mL.
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: Caspr1

Contactin-associated protein 1 (Caspr1), also known as Neurexin-4, Paranodin, and NCP1, is an approximately 190 kDa transmembrane protein that is concentrated at paranodal junctions of axons during myelination. It is required for junction formation and ion channel localization and plays an important role in the propagation of saltatory nerve conduction. Caspr1 interacts with Contactins and Nogo-A at the paranodal junction and inhibits the binding of Contactin to glial cell Neurofascin. Caspr1 is proteolytically cleaved by Reelin, and this action is inhibited by the cellular prion protein (PrP). Mature human Caspr1 consists of a 1264 amino acid (aa) extracellular domain (ECD), a 21 aa transmembrane segment, and an 80 aa cytoplasmic domain. The ECD contains one Factor 5/8-like domain, four Laminin-G-like domains, two EGF-like domains, and one Fibrinogen-like domain. Within the ECD, human Caspr1 shares 95% aa sequence identity with mouse and rat Caspr1.

Long Name
Contactin Associated Protein-like 1
Entrez Gene IDs
8506 (Human); 53321 (Mouse)
Alternate Names
Caspr; Caspr1; CASPRcaspr1; CNTNAP; CNTNAP1; contactin associated protein 1; neurexin 4; Neurexin IV; neurexin-4; NRXN4contactin-associated protein 1; p190

Product Datasheets


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Isotype Controls

Mouse IgG2A Isotype Control

Reconstitution Buffers

Secondary Antibodies

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