4 巻 (2010) 1 号 p. A0034
Flagellar motor is a nano-sized rotary machine. Despite of 40-year research on the flagella, the physic-chemical principle of torque generation in the motor is not clear. Even the conventional technique for measuring torque has a flaw as an experimental method. Image of the flagellar motor is extensively changing at the moment. Updated information on the flagellar motor is presented.