FIG. 2.

Expression of the cutBCA operons in the WT and the ΔCutRmt strains of Mycobacterium sp. strain JC1 grown on various growth substrates. For the determination of the promoter activities for the cutB1 (A) and cutB2 (B) genes, the strains harboring pCUTB1LACZ2 and pCUTB2LACZ2, respectively, were grown as described in Fig. 1, and the β-galactosidase activities were determined. The black and gray bars indicate the enzyme activities detected in the WT and ΔCutRmt strains, respectively. All values provided are the means of two independent determinations. Error bars represent the standard deviations from the mean.