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Fumarate restores to flagella of cytoplasm-free, Che Y-containing envelopes of Escherichia coli and Salmonella typhimurium the ability to switch from one direction of rotation to another. To examine the specificity of this effect, we studied flagellar rotation of envelopes which contained, instead of fumarate, one of its analogues. Malate, maleate and(More)
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