Fig. 2From: Metabolite toxicity determines the pace of molecular evolution within microbial populationsThe number of mutations that accumulated in clones after evolution at pH 6.5 (strong nitrite toxicity) or pH 7.5 (weak nitrite toxicity). Horizontal bars and P-values indicate the outcomes of two-sample Wilcoxon rank-sum tests. The arrow indicates the clone with a mutation in uvrA. Data are presented as Tukey box-plotsBack to article page