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Figure 2 | BMC Evolutionary Biology

Figure 2

From: The cost of antibiotic resistance depends on evolutionary history in Escherichia coli

Figure 2

Adaptation of resistant and sensitive bacteria. Three RifR genotypes, denoted on the x-axis by their amino acid changes, and three replicates of the wild type (WT) were evolved for approximately 200 generations in antibiotic-free LB medium as described previously [24]. White and hatched bars show scores before and after evolution respectively. Each bar shows average ± s.e. competitive fitness relative to the wild type from nine independent assays, conducted in three temporal blocks; for the wild type before evolution standard error is shown for 27 assays.

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