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. Author manuscript; available in PMC: 2008 Nov 4.
Published in final edited form as: J Mol Biol. 2005 Sep 16;352(2):396–408. doi: 10.1016/j.jmb.2005.07.030

Figure 5.

Figure 5

Dependence of the swimming speed on the pH at the optimal Na+ concentration and the dependence of swimming speed on the Na+ concentration at pH 7.0. (a) Relationship between the swimming speed ant the pH at the optimal Na+ concentration. The swimming speed of wild-type, MotAB and MotPB-M were measured at the indicated pH values in the absence of added Na+; MotPB-M was assayed in the presence and absence of 1.5% PVP. The swimming speed of MotPS and MotAS-M was measured in the presence of 180 mM Na+. The data are extracted from the data shown in Figure 4b. Relationship between the swimming speed and [Na+] at pH 7.0. The data are extracted from the data shown in Figure 4c. The swimming speed for the single stator strains was determined at pH 6.0, for MotAB and MotPB-M (in the presence of 1.5% PVP), and at pH 8.5 for MotPS and MotAS-M in assays conducted in 1/20TY at the indicated concentrations of Na+.