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Resistance to heat stress of WT, hfq, and rpoE2 strains. (A) Cells were grown in GAS medium and collected during exponential (open symbols) or stationary (closed symbols) growth phase. Cells were challenged at 50°C for 0 to 30 min. The results are the means from five independent experiments. (B) Cells were grown in GAS medium at 30°C (open symbols) or at 40°C (closed symbols).
