Figure 2: Length dependence of the conductance of different conformations.
Length dependence of the conductance B-form (blue) and A-form (green) diamine-functionalized dsDNA. Logarithmic conductance histograms for (a) 9-mer, (b) 13-mer and (c) 15-mer dsDNA. Dashed lines are Gaussian fits to obtain the most probable conductance. (d) Resistance values obtained from single-molecule conductance experiments are shown versus oligonucleotide length for B-form (blue) and for A-form (green) as solid symbols. Dashed lines are linear fittings corresponding to a hopping process with each guanine base acting as an independent hopping site. Void symbols are predicted values for a hopping process with a coherent correction44 (see Supplementary Methods for details). Error bars represent the standard error of the mean with N=3 measurements.
