Bovine plasma thromboplastin antecedent (factor XI) deficiency
Kociba, G. J.Ratnoff, O. D.Loeb, W. F.Wall, R. L.Heider, Lawrence E.
J Lab Clin Med
A deficiency of plasma thromboplastin antecedent (Factor XI) was detected in a cow which subsequently died from adult multicentric leucosis and lymphoblastic leucaemia. The possibility that the deficiency was familial was raised by the discovery of a paternal half-sister with an indistinguishable clotting defect..