Table 1.

Transcript abundance of selected C10-HSL–regulated genes

	Transcript level*
Strain	catB	antA	PA1897
DA15 (ΔlasR, ΔrhlR, ΔqscR)	0.02	0.74	0.06
DA15 (ΔlasR, ΔrhlR, ΔqscR) plus 2 μM C10-HSL	0.92 (55)	3.2 (4.3)	0.06 (0.9)
SC20 (ΔlasR, ΔrhlR, ΔqscR, ΔPA1136)	0.01	0.43	0.06
SC20 (ΔlasR, ΔrhlR, ΔqscR, ΔPA1136) plus 2 μM C10-HSL	1.6 (93)	4.8 (6.5)	0.06 (1)
PAO1 (WT)	0.08	1.5	1.2
PAO1 (WT) plus 2 μM C10-HSL	1.7 (20)	7.2 (5)	2.7 (2.4)

*Numbers in parentheses indicate fold changes in transcript abundance on growth in the presence of C10-HSL. Transcript abundance was measured by real-time RT-PCR.