Seligsohn U, Osterud B, Brown SF, Griffin JH, Rapaport SI. J Clin Invest. 1979 Oct;64(4):1056-65. Factor VII can be activated, to a molecule giving shorter clotting times with tissue factor, by incubating plasma with kaolin or by clotting plasma. The mechanisms of activation differ. With kaolin, activated Factor XII (XII(a)) was the apparent principal activator. Thus, Factor VII was not […]