 Vibrio pom A B is a type of bacteria that uses sodium to drive its flagella motor. This motor is composed of two parts, a stator unit and a rotor. The stator unit is made up of two proteins, POMA and POMB, which are connected by a flexible linker. When sodium binds to certain regions on POMA, it causes the protein to rotate counterclockwise, which then activates the rotor. This rotation of the stator unit drives the flagellum forward or backward depending on the direction of the sodium gradient. This article was authored by Haydai Hu, Philip F. Pop, Monica Santeveri and others.