Figure 3. The transcriptional regulation, p _EA, that maximizes the growth rate of figure 2 (solid) and the corresponding actual enzyme production rate, p _EA (dot-dashed), in units of molecules per cell and second.

Also shown are the growth rate as fraction per hour (dashed, right scale) and the cost of producing the enzyme E_A, expressed in terms of the total resource expenditure (dotted line, right scale).