Table 2.

β-Galactosidase activity of ohrA andohrR transcription fusion in wild-type and ohrRbackgrounds

StrainGenotypeMean β-Galactosidase activity ± SD (Miller unit)a
MutationReporterUninduced100 μM CHP
HB2012None ohrA 3.44 ± 0.0990.47 ± 1.35
HB2014 ohrR ohrA 513.04 ± 19.58520.31 ± 16.43
HB2011None ohrR 3.65 ± 0.193.73 ± 0.12
HB2013 ohrR ohrR 4.27 ± 0.144.46 ± 0.24
HB2031None ohrA * 128.55 ± 4.12ND
HB2044 ohrR ohrA * 230.37 ± 31.22ND
  • a ND, not done.