FIG 8.

Model of cellular positioning of the motility machinery in the archaeon H. volcanii during different growth phases of the cell. In the early log phase (top), the cells are rod-shaped and possess polar bundles of archaella. Chemosensory arrays (green) are predominantly present at the cell pole, but lateral clusters are also observed, which become polar after cell division. The cells preparing for cell division assemble new archaellum motors at the cell pole to ensure the correct inheritance of the archaella in the daughter cells. After cell division, the cells possess archaella at only a single cell pole. When the cells enter the stationary phase, they lose their archaellum filaments, and the chemosensory arrays are dismantled. FlaD, blue oval; archaellum motor, orange square.