BioMed Research International / 2014 / Article / Fig 1

Review Article

N-Acyl Homoserine Lactone-Mediated Quorum Sensing with Special Reference to Use of Quorum Quenching Bacteria in Membrane Biofouling Control

Figure 1

Schematic representation of the LuxR/AHL type quorum sensing system in Gram-negative bacteria. The “r” is a gene encoding Lux R-type transcription factor R and “i” is gene encoding Lux I-type AHL synthase I. Transcription of QS-regulated target genes appears by Lux R homologue proteins only when high AHL concentration is present, which required a threshold bacterial cell density.