alexa Association of factor XI and high molecular weight kininogen in human plasma.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Thompson RE, Mandle R Jr, Kaplan AP

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Abstract Factor XI and high molecular weight kininogen were found associated in normal human plasma at mol wt 380,000 as assessed by gel filtration on Sephadex G-200. The molecular weight of Factor XI in high molecular weight kininogen-deficient plasma was 175,000, the same value obtained for purified Factor XI. When high molecular weight kininogen-deficient plasma was reconstituted with purified high molecular weight kininogen, all of the Factor XI was then found at mol wt 380,000. Complex formation was also demonstrable upon incubation of Factor XI and highly purified high molecular weight kininogen. This complex was distinct from the prekallikrein-high molecular weight kininogen complex; thus high molecular weight kininogen forms bimolecular complexes with either Factor XI or prekallikrein but does not form a trimolecular complex that includes both Factor XI and prekallikrein. Neither Hageman factor nor plasminogen were found associated with high molecular weight kininogen; binding to high molecular weight kininogen appeared to be a specific property of the Hageman factor substrates.
This article was published in J Clin Invest and referenced in Journal of Diabetes & Metabolism

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