Figure 4.

Effect of cation conductivity on the measured duplex unzipping time when a furan site is present at the latch (duplex 9F, black squares) and outside of the latch (duplex 13F, red circles). The cation type is indicated on the upper x-axis. T_m measurements for each salt are given in Table S1 (Supporting Information). Experiments were carried out in 10 mM phosphate buffer (pH 7.5) at 25 °C with electrolyte added at a 1.00 M concentration, as indicated. Data were recorded at 120 mV (trans versus cis). Time distribution histograms for each cation are shown in Figure S3 (Supporting Information).