Fig. 3
From: High-level de novo biosynthesis of glycosylated zeaxanthin and astaxanthin in Escherichia coli
Tuning the translation of zeaxanthin glucosyltransferase. A Carotenoid contents of zeaxanthin glucoside strains. ‘zea’ strain is the parental zeaxanthin strain without expressing crtX. B OD600 of different strains. Error bars, mean ± s.d., n = 2 or 3. C Different RBSs used for crtX and their relative strengths. D Correlation between the glycosylation efficiency of zeaxanthin and the RBS strength of crtX. The glycosylation efficiency is defined as the percentage of zeaxanthin diglucoside yield to the total yield of zeaxanthin and its two glucosides