FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term Factor XII activation ID (Ontology) GO:0002542 (Gene Ontology)
Definition Any process that activates Factor XII (Hageman factor). Factor XII is a protein synthesized by the liver that circulates in an inactive form until it encounters collagen or basement membrane or activated platelets (as occurs at the site of endothelial injury). Factor XII then undergoes a conformational change (becoming factor XIIa), exposing an active serine center that can subsequently cleave protein substrates and activate a variety of mediator systems. Factor XII is a participant in the clotting cascade as well as the kinin cascade.[ ISBN:0721601871 ]
Also Known As "Hageman factor activation"
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positive regulation of proteolysis
 |__positive regulation of protein processing__
regulation of inflammatory response            |
 |__regulation of acute inflammatory response__|
regulation of protein processing               |
 |__positive regulation of protein processing__|
positive regulation of protein maturation      |
 |__positive regulation of protein processing__|
                                               Factor XII activation
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Is a regulation of acute inflammatory response
positive regulation of protein processing
Part of plasma kallikrein-kinin cascade
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  • "Hageman factor activation" EXACT
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