Table 2.

Effect of ompR234 on expression ofompC and ompF at low and high osmolarities

StrainRelevant genotypeβ-Galactosidase activitya
−NaCl+NaCl
PHL841ompF-lacZ264.011.5
PHL839ompF-lacZ ompR234454.016.7
PHL842ompC-lacZ118.7682.0
PHL840ompC-lacZ ompR234242.4634.3
  • a Bacteria were grown at 30°C in MOPS medium (−NaCl) or in MOPS medium containing 300 mM NaCl (+NaCl). β-Galactosidase activity was assayed at mid-log growth phase. The values are means from three independent cultures and are expressed as nanomoles of products liberated per minute per milligram (dry weight) of bacteria.