Table 2.

Acyl-HSL production of P. aeruginosa PAO1

Carbon source*	3OC12-HSL, μM†	C4-HSL, μM†
Caseinate	0.29 ± 0.03	2.2 ± 0.2
CAA	0.43 ± 0.04	0.49 ± 0.03

*M9 minimal medium supplemented with 1% (wt/vol) caseinate or 0.5% (wt/vol) CAA.

^†Acyl-HSL concentrations ± STD were determined by bioassay. Both cultures contained an identical number of bacteria (1 × 10⁹ CFU/ml) at the time of measurement.