Table 3. Effect of HHQ addition on phz1 operon expression in PA14 and lasR cultures
β-gal activity, MU
PA14 lasR-
-HHQ 371 ± 8 78.7 ± 1.5
+HHQ 473 ± 23 83.7 ± 0.2
  • Cultures were assayed at 8 hr, corresponding to OD600 4.3-4.5. The bacteria carry a phzABC-lacZ fusion. Data correspond to averages of triplicates ± SD. MU, Miller units.