A switch-complex protein involved in reception of phosphorylated CheY and control of rotational bias.
Binding of phosphorylated CheY changes the switch’s rotational bias. A change in bias alters the balance of swimming behaviours without requiring the motor to sense external attractant directly. [ref]
Change in direction of flagellar rotation is the basis of the chemotactic response in Escherichia coli by S. H. Larsen and others. 1974, tethered-cell motor-direction response
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