factor XII

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Related to Factor xiia: factor XI, Factor xiiia

factor XII

[′fak·tər ′twelv]
(biochemistry)
A blood clotting factor effective experimentally only in vitro; deficient in hemophiliacs. Also known as Hageman factor.
References in periodicals archive ?
Mapping of the active sites of bovine thrombin, factor IXa, factor Xa, factor XIa, factor XIIa, plasma kallikrein, and trypsin with amino acid and peptide thioesters: development of new sensitive substrates.