Figure 7.
Enhanced duplex RNA unwinding by the cooperative translocation of helicase nsP13 under adequate ATP concentrations. (A) Gel retardation assay of nsP13 and duplex RNA substrates. The unwinding of 30U/25D RNA with 0.5 μM and 2 μM helicase nsP13. The unwinding reaction was performed with 8 mM ATP and 5 nM substrate at 37 °C. The unwinding products were resolved by non-denaturing 15% PAGE. (B) The amplitudes were as follows: 0.5 μM helicase nsP13 (●) = 0.68 ± 0.01 and 2 μM helicase nsP13 (▽) = 0.96 ± 0.005.