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Ion dependence of the swimming motility of E. coli MotB mutants and V. alginolyticus PomB mutants
| Na+ | Li+ | K+ | H+ | |
|---|---|---|---|---|
| WT-MotA/B | − | − | − | ++ |
| MotB(A39G) | − | − | − | ++ |
| (A39T) | − | − | − | ++ |
| WT-PomA/B | ++ | + | − | − |
| PomB(C31G) | ++ | + | − | − |
| (C31V) | ++ | + | − | − |
| (C31L) | + | +/− | − | − |
The E. coli strain RP6894 (ΔmotAB) and the Vibrio alginolyticus strain NMB191 (ΔpomAB) were used as the host cell.
++, Vigorous swimming motility; +, slow swimming motility; +/−, very slow swimming motility; −, nonmotile.
