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. 2013 Dec 8;3(1):15–28. doi: 10.1002/mbo3.143

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© 2013 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Acid resistance of cells lacking rpoS-activating sRNA genes. (A) Survival rates of Escherichia coli mutant cells with deletion of each rpoS-activating sRNA gene under conditions of acid shock (pH 2.0) were determined using stationary-phase cells (shown in linear scale). Values are averaged from at least three independent experiments. (B) Acid resistance of mutant cells was evaluated based on colony-forming ability. (C) Acid resistance of MG1655Δ3 cells lacking all three rpoS-activating sRNA genes was evaluated based on the colony-forming abilities of stationary-phase cells.