FIG. 8.

The misR promoter activity is not affected by different magnesium concentrations. β-Galactosidase activities of reporter strains grown in peptone broth supplemented with various amounts of magnesium were determined. Black bar, 0 mM; dotted bar, 1 mM; hatched bar, 2 mM; gray bar, 10 mM; white bar, 20 mM. A representative result from two independent experiments is shown where each condition was assayed in four replicates. Error bars indicate standard deviations.