A rapid purification with high recovery of factor XII (Hageman factor) on immunoaffinity column: application to an abnormal clotting factor XII (factor XIITORONTO)

A rapid purification procedure with high recovery of blood coagulation factor XII (Hageman factor, HF) was established. Homogeneous HF was isolated in 6 days on a monoclonal antibody-immunoaffinity column chromatography followed by gel filtration. Approximately 4,300-fold purification of HF was attained with 31% yield on average (n = 4). Using this method, an abnormal HF was purified from plasma of a patient with cross-reacting material (CRM)-positive Hageman trait (factor XIITORONTO). The abnormal HF was found to be a single chain polypeptide with the same molecular weight (80,000) as the normal HF. Both abnormal and normal HF had similar amino acid compositions.