Figure 3:

(a) Conductance decay fitted to an exponential with a decay constant 1/λ = 0.107 ± 0.003 nm⁻¹ (red points in (a), R² = 0.998). The black data points (data from ref. 23) are for the region of hopping transport for the organic molecular wire oligo(phenylene ethylenene), illustrating the relative improvement offered by protein wires for distances greater than ~ 6 nm. (b) The increase of resistance with length departs significantly from the linear behavior usually expected for hopping (red line, R²=0.925) but is well-fitted by a square-law dependence (blue line, R² = 0.994). Error bars are approximately equal to symbol sizes.