Figure 2.

Schematic illustration of the QS system in P. aeruginosa. There are four QS systems in P. aeruginosa, las, rhl, iqs and pqs. They included respectively the receptors LasR, RhlR, IqsR, and PqsR, the autoinducers OdDHL, C4HSL, IQS, and PQS, as well as the transcription factors LasI, RhlI, AmbBCDE, and PqsABCD. The arrows indicate a stimulatory effect, while the perpendicular line indicates an inhibitory effect. In the dashed box are the associated virulence factors and QS systems. HCN, hydrogen cyanide.