title: A coagulation reagent completely devoid of factor X; relation between clotting time and concentration of factor X.
mesh_terms: D000818:Animals; D001780:Blood Coagulation Tests / Q000379:methods; D002417:Cattle; D005167:Factor VII / Q000302:isolation & purification; D005170:Factor X / Q000302:isolation & purification; D007202:Indicators and Reagents; D011516:Prothrombin / Q000302:isolation & purification; D011817:Rabbits; D013997:Time Factors
chemical_list: D007202:Indicators and Reagents; D005167:Factor VII; D011516:Prothrombin; D005170:Factor X