Figure S3.
Representative interaction energy measurement at 12′ and 13′ positions. (a and b) MCA to estimate Δ2G0 between 12′T in the α and β subunits (a) and between 13′V in the β and ε subunits (b). Representative single-channel currents and dwell-time distribution histograms are shown for the WT, mutant A, B, and double mutant AB. The corresponding free energy changes (see Tables S4 and S5) and scale bars are shown.