<i>Y</i>. <i>pestis</i> strains with multiple plasmid-encoded copies of <i>rovM</i> grow at a faster rate.

<p>Growth of <i>Y</i>. <i>pestis</i> strains in LB medium (A) and TMH supplemented with 0.2% galactose (B). Growth curves are the mean±SD of four independent biological replicates. The mean mean±SD of the growth rate (μ) is given in parentheses. All closed symbol growth curves represent strains containing multiple copies of <i>rovM</i>. A One Way ANOVA combined with a Tukey’s test was used to test significant differences in the growth rate between strains. The overall P-value for the ANOVA was P<0.0001. Significant differences in μ between strains are indicated by *** for P<0.001, ** for P<0.01 and * for P<0.05. Curly brackets group together strains that do not have significant differences. Capped bars indicate strains that are being compared.