Expression of levD promoter:cat fusion as represented by the CAT specific activities in the wild-type strain UA159 and various levQ mutants.

aThe data are presented as the average results of three independent cultures. Cells were cultured in TV broth with 0.5% of the indicated carbohydrates and assays were performed as described in Materials and Methods. Activity is expressed as nmol of chloramphenicol acetylated (mg of protein−1×min−1).