Relative expression levels of the loci situated within the genetic island that harbors PocR. Color-scale plot of the relative expression levels of the loci situated between lreu_1690 and lreu_1757 (not to scale). All genes situated within the genetic island are up-regulated when lreu_1750 is overexpressed with the exception of the transposase. The lack of statistical significance observed for some of the loci is discussed in the text. Abbreviations stand for: M, log2(intensity of signal of L. reuteri pNZ7748/intensity of signal of L. reuteri pNZ7021); "*", p-value ≤ 0.05.