title: Platelets and surface-mediated clotting activity.
abstract: In contrast to previously reported studies, no evidence could be adduced for the activation of Hageman factor (factor XII) by platelets, whether or not these cells had been incubated with adenosine diphosphate (ADP).
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D001777:Blood Coagulation / Q000187:drug effects; D001792:Blood Platelets / Q000502:physiology*; D005174:Factor XII / Q000502:physiology*; D006801:Humans; D066298:In Vitro Techniques; D011288:Prekallikrein
chemical_list: D000244:Adenosine Diphosphate; D005174:Factor XII; D011288:Prekallikrein