Figure 2.

RNA-based control mechanism of E. coli and Salmonella. (A) Riboregulators controlling the colonization factors of pathogenic E. coli important for efficient cell adhesion and invasion. (B) Riboregulators coordinating the expression of Salmonella pathogenicity factors, responsible for cell entry, intracellular persistence and proliferation. The riboregulators are given in black and the target genes in green for flagella biosynthesis, in red for curli formation, in purple for pili production, and in blue for T3SS genes encoded on the pathogenicity islands LEE of EHEC/EPEC (A) or SPI-1 and SPI-2 of Salmonella (B).