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Expression of β-galactosidase activity in P. aeruginosa cells containing the PbadD-′lacZ reporter plasmid pPE805 and either the BadM-expressing plasmid pCP439 (+ BadM) or the control vector pBBR1MCS-2 (−BadM). Cells were grown aerobically in Luria broth or anaerobically in Luria broth plus 0.2% glucose plus 10 mM potassium nitrate. Data are averages from three different experiments, plus or minus standard deviations. β-Galactosidase activity is in Miller units (20).
