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You are here:Home » Antibodies » Antibodies-Coagulation Factors » Anti -Factor XII (Hageman Factor)

Anti -Factor XII (Hageman Factor)


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Clone Host Grade Applications
Polyclonal Goat Purified E
Factor XII (F.XII, Hageman factor) is a 76kD, single chain
glycoprotein produced in the liver. In plasma, F.XII circulates as a protease zymogen at a concentration of~30ug/ml (400nM). Upon vascular injury F.XII binds to negatively charged
extravascular surfaces such as cartilage and skin, which facilitate
activation of the zymogen to the active serine protease. Cleavage of F.XII by kallikrein after residue Arg353 produces the enzyme alapha F.XIIa, consisting of a 28kD light chain containing the protease domain, and a 52kD heavy chain containing the anionic surface-binding domain. Substrates for surface bound F.XIIa include the zymogens prekallikrein (PK) and factor XI (F.XI) as well as the procofactor high-molecular weight kininogen (HK). The activation of these substrates results in positive feedback activation of F.XII. Further cleavage of alpha F.XIIa by kallikrein produces the 28kD fragment beta F.XIIa (hageman factor fragment). beta F.XIIa has reduced procoagulant activity as it lacks the anionic surface-binding domain, but is capable of fluid-phase activation of PK, factor VII and complement C1. The activity of F.XIIa in plasma is regulated predominantly by C1-Inhibitor, with relatively minor contributions by alpha 2antiplasmin, alpha 2macroglobulin and antithrombin, even in the presence of therapeutic levels of heparin1-3.
Catalog #F0019-06A
ApplicationSuitable for use in ELISA and Immunoelectrophoresis. Other applications not tested.
Recommended DilutionOptimal dilutions to be determined by the researcher.
Storage and StabilityMay be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Clone TypePolyclonal
FormSupplied in 10mM HEPES, pH7.4, 0.15M sodium chloride, 50% glycerol. No preservative added.
PurityPurified by caprylic acid and ammonium sulfate precipitations, and solid -phase adsorption to remove unwanted crossreactivity.
ImmunogenHuman Factor XII (F.XIIa) purified from plasma.
SpecificityRecognizes human Factor XII.
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

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