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Growth of MG1655 (▪), FB21678 (basR mutant) (□), FB21676 (basS mutant) (•), FB20544 (fliM mutant) (○), FB22122 (ycdM mutant) (▴), and FB21346 (yibD mutant) (×) in the absence of additional ZnSO4 in the minimal medium (A and B) and in the presence of 0.175 mM ZnSO4 (C and D) and 0.2 mM ZnSO4 (E and F). The values are means for triplicate cultures; the error bars indicate standard deviations.
