Figure 6

Evolutionary stability of the studied BioBrick™ promoters expressing RFP. The devices integrated in the Ф80 (A) and aspA (B) loci were propagated without antibiotic, while the devices carried on the low-copy vector pSB4C5 were propagated without (C) or with (D) antibiotic. The four panels show the average percent activity of all the five studied promoters over time in each condition, where 100% represents the average activity at generation 0. For each time point, error bars represent the standard deviations of the measured values.