Transcriptional architecture of the entire SPI1 and SPI2 loci at ESP and LSP in parental and Δ<i>relA</i>Δ<i>spoT</i> strains.

<p>Enriched (+) and non-enriched (−) cDNAs of <i>S</i>. Typhimurium parental (black) or ppGpp⁰ (<i>ΔrelAΔspoT</i>) (red) strains mapped onto the SPI1 and SPI2 loci. Operons are indicated by horizontal arrows and annotated according to the first gene. The Y axis in each lane represents 0–50 mapped reads per genome position. The dRNA-seq data for ESP was from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0092690#pone.0092690-Ramachandran1" target="_blank">[19]</a>.