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Table 1 Expression of the lacZ fusions under different growth conditions

From: Molecular cloning and characterization of Escherichia coli K12 ygjG gene

  β-Galactosidase activity, MUb
Plasmida LBc M9, Nitrogen Sufficientc M9, Nitrogen Limitedc
pBR-σ54-lacZ-1 190 3,500 22,500
pBR-σ54-lacZ-2 140 400 800
pBR-lacZ-3 110 130 170
  1. a Plasmids were transformed into E. coli TG1 strain. b In Miller units [24]. c For growth conditions and β-galactosidase assay see Materials and Methods.