Fig. 5. Surface charge distribution of ParM. The electrostatic potential [–6 kT (red) to +6 kT (blue)] is plotted onto the surface of ParM. The plots shown are a view from the outside of the filaments (‘outside’), and a view facing the second protofilament (‘inside’); ‘top’ and ‘bottom’ show the surface of the subunits after a 90° rotation around the x-axis, with respect to the plots in the upper half of the figure. Subdomains are labelled as in Figure 3. The figure was prepared using GRASP (Nicholls et al., 1991).