A-D. Relative fluorescence intensities (y-axis) of E. coli strains harboring the gene-specific translational reporters for ptsG (A), treB (B), nagE (C) and ptsHI (D), fused to sfGFP, combined with either an empty vector control (pCtrl) or vcdRP expression plasmids (pVcdRP, pVcdR, pVcdP and pVcdRP Δ4C, x-axis). Cells were grown in LB to OD600 of 1.0 and fluorophore production was measured. The fluorescence of pCtrl (for each reporter fusion) was set to 1. 