Figure 3From: Global effect of RpoS on gene expression in pathogenic Escherichia coli O157:H7 strain EDL933Effect of rpoS mutation on survival under stress. Stationary phase cultures were washed and diluted in 0.9% NaCl before exposure to low pH (2.5) (A), H2O2 (15 mM) (B), and heat (55°C) (C). WT, wild type EDL933; rpoS, rpoS mutant.Back to article page