FIG. 6.

Levels of hilC and hilD transcription in the absence of ClpXP and/or FliZ in cells. The levels of expression of a lacZ fusion to the hilC or hilD promoter in cells with different genetic backgrounds were assayed. Plasmid pTKY559 (hilC promoter-lacZ fusion) or pTKY562 (hilD promoter-lacZ fusion) was introduced into bacterial strains χ3306 (clpPX⁺ fliZ⁺), CS2007 (ΔclpPX fliZ⁺), CS2462 (clpPX⁺ ΔfliZ), and CS2464 (ΔclpPX ΔfliZ). The resultant stains were used for determination of β-galactosidase activity. The values represent the means and standard deviations for samples tested at least in triplicate.