Kinetics of P2 cleavage in the presence of F12. Initial velocities
of thrombin formation were measured in reaction mixtures containing increasing
concentrations of P2, 3.8 pm prothrombinase (3.8 pm Xa,
27 nm Va, 31 μm PCPSLUV) using
concentrations of F12 fixed at 24 nm (•), 48 nm
(○), 100 nm (▴), 200 nm (▵), and 500
nm (▾). The lines are drawn following analysis
according to Scheme 2 using the
fixed and fitted parameters listed in Table
2.