Fig. 5From: Metabolite toxicity determines the pace of molecular evolution within microbial populationsCompetitive fitness of evolved clones relative to the ancestor. Evolved cells were initially present in the culture at a frequency of 5%. Differences were compared using an ANOVA test followed by a post hoc Tukey’s HSD test. Significant differences correspond to P < 0.01. Alphabetic assignments indicate groups that are statistically different from each otherBack to article page