It is clear now that ATP provides the driving force for all ABC transporters. However, same net effect, since modified substrate conc. can be higher than unmodified substrate outside the cell. Very common in strict and facultative anaerobes, since energy is more limiting for these organisms. Enzyme 1 and HPr are common to all PTS chains. Minimally, a third cytoplasmic membrane protein, Enzyme II, specific for the transported compound, is required.
B are soluble.
If there is no glucose, then Enz. Bacteria with only a single, polar flagellum cannot behave the same way, since there is no bundle to fly apart. In Rhodobacter sphaeroides , a well studied case, motors alternate between turning and not turning. When the motor stops, the flagellum coils up very tightly, and the cells tumble until motor starts again. Spirochetes are well adapted to swim in viscous liquids.