Figure 3From: Effects of indole on drug resistance and virulence of Salmonella enterica serovar Typhimurium revealed by genome-wide analysesIndole represses expression of invasion genes encoded by SPI-1. The effect of indole on expression of SPI-1 genes including hilA (A), sipA (B), invA (C), and invF (D) was measured by qRT-PCR. The wild-type ATCC 14028s strain (open bars) and its ramA::kanR deletion mutant (solid bars) were grown with indole concentrations between 0 and 1 mM. Genes expression levels were expressed relative to that measured in the wild-type strain grown without indole, which was assigned the unit value.Back to article page