Thromb Haemost 1970; 24(03/04): 345-351
DOI: 10.1055/s-0038-1654243
Originalarbeiten – Original Articles – Travaux Originaux
Schattauer GmbH

Blood Coagulation

Role of Hageman Protein (F-XII) and Autoprothrombin II (F-IX?) in the Activation of Autoprothrombin III (F-X)[*]
Walter H. Seegers
1   Department of Physiology and Pharmacology, Wayne State University, School of Medicine, Detroit, Michigan, U.S.A
,
Gary L. Grammens
1   Department of Physiology and Pharmacology, Wayne State University, School of Medicine, Detroit, Michigan, U.S.A
,
Lowell E. McCoy
1   Department of Physiology and Pharmacology, Wayne State University, School of Medicine, Detroit, Michigan, U.S.A
› Author Affiliations
Further Information

Publication History

Publication Date:
24 July 2018 (online)

Preview

Summary

Preparations of platelet factor 3 accelerated the conversion of purified autoprothrombin III (F-X) to autoprothrombin C (F-X?). The reaction was slow and the yields were low. Purified Hageman factor or purified autoprothrombin II (F-IX?) functioned as platelet cofactors. Each increased the yield of autoprothrombin C from purified autoprothrombin III above that obtained with platelet factor 3 alone. Hageman protein thus has a role in the direct acceleration of the first basic reaction in blood coagulation. Purified prothrombin was made refractory to the two-stage analytical reagents with Hageman factor.

* This work was supported by a research grant HE-03424-13 from the National Heart Institute, National Institutes of Health, U.S. Public Health Service. We wish to thank Eberhard F. Mammen for helpful suggestions and discussions.