Human Coagulation Factor XI Heavy Chain Antibody

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Product Details
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Human Coagulation Factor XI Heavy Chain Antibody Summary

Species Reactivity
Detects human Coagulation Factor XI Heavy Chain in direct ELISAs and Western blots.
Monoclonal Mouse IgG2B Clone # 318101
Protein A or G purified from hybridoma culture supernatant
Mouse myeloma cell line NS0-derived recombinant human Coagulation Factor XI
Accession # P03951
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.

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Recommended Concentration
Western Blot
1 µg/mL
Recombinant Human Coagulation Factor XI (Catalog # 2460-SE) under non-reducing conditions only
25 µg/mL
Conditioned cell culture medium spiked with Recombinant Human Coagulation Factor XI (Catalog # 2460-SE), see our available Western blot detection antibodies

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

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


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: Coagulation Factor XI

Coagulation factors XI and XIa refer to the pro and active forms of the same protease, respectively (1). Factor XI is synthesized in the liver and circulates in the plasma as a disulfide bond-linked dimer complexed with high molecular weight kininogen. Factor XI is converted into XIa via either the contact phase of blood coagulation or thrombin-mediated activation on the platelet surface. The resulting XIa converts factor IX into IXa, which subsequently activates factor X into Xa. Factor Xa in turn activates factor II/thrombin to complete the coagulation cascade. Patients with factor XI deficiency are prone to excessive bleeding after hemostatic challenge. There are two alternative splicing forms. Isoform 1 corresponds to the circulating plasma factor XI and isoform 2 is produced by platelets and megakaryocytes but absent from other blood cells (2). The 625 amino acid precursor of isoform 1 consists of a signal peptide (aa 1‑18) and the mature chain (aa 19‑625). The mature chain (XI) can be further processed into the heavy chain (aa 19‑387) and the light chain (aa 388‑625) (XIa).

  1. Wash, P.N. (2004) in Handbook of Proteolytic Enzymes, Barrett, A.J. et al. eds. p. 1651.
  2. Hsu, T.C. et al. (1998) J. Biol. Chem. 273:13787.
Entrez Gene IDs
2160 (Human); 109821 (Mouse)
Alternate Names
Coagulation Factor XI; EC 3.4.21; EC; FXIPlasma thromboplastin antecedent; MGC141891; PTA

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