Fig 4. PA0506 is required for C18 fatty acid to serve as a PQS precursor.

Cultures of the indicated strains were grown for 24 h in LB medium alone (open bars) or supplemented with either octanoic acid (black bars) or oleic acid (hatched bars). PQS was extracted and quantified as described in Materials and Methods. Data are presented as the average ± SD of three independent experiments.