Fig. 11

3D sodium ion densities around the Drew-Dickerson dodecamer (a) and the GC-rich dodecamer (b) at different protein concentrations. The ion density observed in 0% crowding is shown with a transparent representation for comparison with ion densities (orange) in crowded solutions. Density contours are shown at a level of 0.002 Å^− 3. The top and bottom figures represent front and top views of DNA