Electrostatic maps of the vWF-A domains in human vWF. The electostatic maps show the Connolly surface of the domains with a color range of red representing a potential of less than −4 kT, blue a potential of more than +4kT (basic) and white as 0kT (neutral). Linear interpolation of the colors represents potentials between −4 kT and +4 kT. The electrostatic surfaces are shown alongside ribbon diagrams of the protein backbone of the respective domains. The domains are shown in two perspectives, rotated along the vertical axis by 180°. The ribbon views permit comparison with Figs 4 and 6.