Temporal control of thrombin activity. (a) Scheme showing temporal
control of thrombin activity regulated by an upstream delayed SDR
mediated by RNase H. The output strand of this reaction is the G-quadruplex
TBA that inhibits thrombin activity (dashed box). (b) Percentage of
active thrombin VS time (from the addition of RNase H in solution)
for different concentrations of RNase H. (c) Percentage of active
thrombin after 3 h vs RNase H concentration. Experiments were performed
in Tris HCl 20 mM, MgCl2 10 mM, EDTA 1 mM, 150 mM NaCl,
pH 8.0 at T = 25 °C. [Target duplex] = 50 nM,
[RNA-blocker] = 150 nM, [thrombin] = 0.5 nM, [fibrinogen] = 1 mg/mL.