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Number of nonsynonymous mutations by gene function category documented in PAOMS derivatives exposed for 7 days to increasing concentrations of ceftazidime (CAZ), ciprofloxacin (CIP), meropenem (MER), or control without antibiotics. The mean ± SD values obtained for three independent lineages are shown. Statistically significant differences (P < 0.05, Student's t test) for one condition respect to each of the other 3 are indicated with an asterisk.
