Fig. (2).

Quantification of the activity of the MtfsZ promoters using the levels of reporter mRNA and fluorescence intensity of the reporter protein. (A). Real time PCR quantification of the gfp_m²⁺ reporter mRNA levels. (B). Fluorescence spectrophotometric quantification of the fluorescence intensity of the GFP_m²⁺ reporter protein. Significant differences in the activity between the promoters under each method are indicated in term of P-values in the text.