Fig. 7
ATCC 33988 shows muted expression from the QS network. (a) Schematic showing QS autoinducer synthesis genes and cognate receptors for in Pseudomonas aeruginosa as discussed in text. LC-MS traces of the autoinducer molecules (b) 3-oxo-C12-HSL and (c) PQS in the extracellular media. Triangles represent putative PQS isomers with different retention times but the same exact mass as the PQS standard