Fig 4.

Repression of speH (A), sof (B), sfbX49 (C), and emm49 (D) was dependent on both Rgg and LacD.1. Firefly reporter fusion plasmids containing the DNA upstream of speH, sof, sfbX49, and emm49 were transformed into the wild type (wt), rgg mutant (rgg−), lacD.1 mutant (lacD.1−), and lacD.1 mutant complemented with the lacD.1 gene (lacD.1+). The strains were grown to the exponential phase of growth, and promoter activity was determined by measuring luciferase. The means and standard errors of the means from three independent experiments are shown.