Heat- and storage-stable plasma protein that is activated by tissue thromboplastin to form factor VIIa in the extrinsic pathway of blood coagulation. The activated form then catalyzes the activation of factor X to factor Xa.

Synonyms: Stable Factor, Proconvertin, Factor 7, Factor VII, Coagulation, Factor Seven, Blood Coagulation Factor VII, 9001-25-6, Coagulation Factor VII, Factor VII, Blood-coagulation factor VII