Figure 6. The effects of three QS systems on the expression of one phz gene cluster in the absence of the other.

(a) Growth of strains carrying the phz1 reporter construct. (b) The relative level of phz1 expression as indicated by β-galactosidase activities in the background of Δphz2. M. u. indicates Miller unit. (c) Growth of strains carrying the phz2 reporter construct. (d) The relative level of phz2 expression as indicated by β-galactosidase activities in the background of Δphz1. The values shown are the means ± one SD from three independent experiments.