Table 3.

Aerobic and anaerobic β-galactosidase activity of Φ(adhE-lacZ)291 in the presence of 40 mM nitrate and a narL mutationa

StrainRelevant genotypeβ-Galactosidase activity (Miller units)
+O2−O2+NO3
+O2−O2
ECL4011Φ(adhE-lacZ)291 312 ± 152,815 ± 49129 ± 10151 ± 29
ECL4033Φ(adhE-lacZ)291 narL::Tn10 326 ± 233,153 ± 18188 ± 252,993 ± 23
  • a The cells were grown in LB-glucose medium and assayed in the exponential phase of growth (OD600, 0.4).