Figure 3From: Multidrug resistance protein MdtM adds to the repertoire of antiporters involved in alkaline pH homeostasis in Escherichia coli E. coli cells complemented with mdtM require sodium or potassium for growth at alkaline pH. Growth of E. coli BW25113 ΔmdtM cells complemented with plasmidic, wild-type mdtM in salt-free liquid medium supplemented with either 0 mM, 20 mM, 40 mM or 86 mM NaCl (A) or KCl (B). Data points and error bars represent the mean ± SE of three independent experiments.Back to article page