Figure 3

Production of zeaxanthin (A) and astaxanthin (B) by E. coli BW-ASTA (in mg per liter of culture (rhomboid)) and in mg per gram cellular dry weight (cdw; (square)) after cultivation for 48 h under different conditions. Values represent the mean (n = 4) ± standard deviation. * indicates significant changes between un-induced (LB or MM) and induced state (LB Rha, LB IPTG or MM IPTG, MM Rha IPTG, respectively). p ≤ 0.05, unpaired t-test assuming unequal variances.