Growth rate as a function of eGFP expression in different growth media.

<p><b>A</b>. Growth rate plotted as a function of eGFP mass fraction of dry cell weight (d.c.w.) for promoter variants grown in M9 (blue open squares), M9-CA (green open triangles), and LB (red open circles). Dashed lines are best linear fits of each dataset. <b>B</b>. Relative growth rate plotted as a function of eGFP mass fraction of d.c.w. for promoter variants. The growth rate is normalized to the maximum growth rate in the absence of gene expression. The dashed olive lines represent the range of values from theoretical predictions. Error bars represent one standard deviation of at least two independent measurements.