Abstract
I would like to report some results obtained by Yano , Yamamoto and myself on a novel system ( Yano et al., 1982) we have named the actomyosin motor in which a rotor with attached F-actin rotates in a specific direction, driven by the ATP-splitting interaction with active fragments of myosin, heavy meromyosin or subfragment-1, in a solution containing MgATP. The actomyosin motor is not only interesting as a new kind of motor made of biological material but also, as a stream cell ( Yano , 1978; Yano et al., 1978; Yano & Shimizu, 1978; Shimizu & Yano , 1978; Shimizu, 1979), is suitable for the study of chemo-mechanical coupling by actin and active fragments of myosin. Active motion of the motor was observed in almost 100% of the experiments, when carefully performed.
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