FIG. 3.

The L. pneumophila ΔargR microarray. Analysis of the transcriptional profile of a ΔargR mutant (GAH280) in comparison with its isogenic parent, wild-type (WT) strain KS79, during the exponential (E) and postexponential (PE) growth phases in AYE rich medium. ArgR-affected genes, defined by a mutant/wild-type log₂ ratio ± 1.5 and P ≤ 0.005, were clustered using TIGR MeV (B). Depiction of the number of genes positively or negatively affected by ArgR in either phase of growth is shown as a Venn diagram (A). Genes negatively affected during both phases of growth are indicated by a vertical red bar (B).