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Fig. 5. Competition of Na+ with Li+ for swimming speed of each strain. NMB191 cells expressing PomAB(pYA303), PomA+MomB6, RsMotA+PomB or RsMotA+MomB6 were suspended in buffers at various concentrations of Na+ with 200 mM K+ (open squares) or 200 mM Li+ (closed diamonds) and their swimming speeds were measured. The total salt concentration was adjusted to 300 mM with K+.
