Bacterial flagellar motor. Electron cryotomography scan of a Treponema primitia flagellar motor seen in side view (top left), cut-away view (top right), oblique top view (lower left) and oblique bottom view (lower right). This bacterium is able to move by use of an internal flagellum. A molecular motor rotates the flagellum enabling the entire bacteria to gyrate and move through liquid. The motor is made from 25 different proteins and spins at 300 revolutions per second. It comprises of a ring shaped torque generator, known as a stator, a central rotor and a rod that turns the flagellum. Molecular motors could one day be built into artificial nanotechnology. Published in Nature, 442, 1062-1064.