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Viability comparison of wild-type B. bacilliformis and an ialB mutant strain from pH 5.0 to pH 8.0. The graph represents the averaged results from four experiments and shows that ialB does not confer a survival advantage under these experimental conditions. To compensate for the differing number of bacteria used in each experiment, CFU's for each experiment were normalized using that experiment's CFU count at pH 7.2.
