Blood, 1958, Vol. 13, No. 4, pp. 382-397.
© 1958 American Society of Hematology, Inc.
A Circulating Inhibitor (Anti-AcG) Specific for the Labile
Factor-V of the Blood-Clotting Mechanism
JOHN H. FERGUSON 1,
CHARLES L. JOHNSTON JR. 1, and
DORIS A. HOWELL 1
1 Department of Physiology, University of North Carolina, Chapel Hill, and
the Department of Pediatrics, Duke University, Durham, North Carolina.
Study of the present hemorrhagic disorder establishes, without doubt, the
presence of a powerful specific anti-AcG. The deprivation of AcG due to
this inhibitor confirms the view that the labile factor plays a key role in
the blood clotting system in at least two phases, namely, (1) during thromboplastin generation, and (2) later, during the conversion of prothrombin
to thrombin. AcG is an essential component of many special clotting-test
systems.
Submitted on August 29, 1957
Accepted on November 18, 1957