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Motility of a marine alkali-tolerant bacterium, Vibrio alginolyticus, can be observed in the presence of high concentrations of a protonophorous uncoupler, CCCP. Motility in the CCCP-containing media is completely inhibited by decrease in extracellular [Na + ] or by monensin-induced increase in intracellular [Na + ]. A mutant has been selected that grows only in media supplemented...
In Halobacterium halobium tactic responses towards light and chemoeffectors are accompanied by changes in the methylation level of methyl-accepting chemotaxis proteins (MCP). Taxis towards green light absorbed by the bacteriorhodopsin proton pump appears to be governed by Δμ H+ -sensing. The addition of CCCP, an uncoupler, prevented the increase of MCP methylation in response to green...
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