Structure and electrostatic potential on the surface of the Eg5 motor domain. Here, α tubulins, β tubulins, and the Eg5 motor domain are shown in blue, pink and orange, respectively. Positively and negatively charged regions are colored in blue and red, respectively. (A) Top view of the structure of Eg5. (B) Top view of the electrostatic potential on the surface of Eg5. (C) Front view of the structure of Eg5. (D) Front view of the electrostatic potential on the surface of Eg5. (E) Bottom view of the structure of Eg5. (F) Bottom view of the electrostatic potential on the surface of Eg5. (G) Front view of the structure of the tubulin heterodimer. (H) Front view of the electrostatic potential on the surface of the tubulin heterodimer. (I) Top view of the structure of the tubulin heterodimer. (J) Top view of the electrostatic potential on the surface of the tubulin heterodimer. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)