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Fig. 4 | Bioresources and Bioprocessing

Fig. 4

From: High-level de novo biosynthesis of glycosylated zeaxanthin and astaxanthin in Escherichia coli

Fig. 4

The effects of carbon sources on the production of zeaxanthin glucosides. A Carotenoid contents and OD600 of strain X1 by comparison of different carbon sources: 10 g/L glucose, 10 g/L glycerol and their mixture, 5 g/L glucose + 5 g/L glycerol (glc + gly). B Carotenoid contents and OD600 of strains X1 and “ + crtY” by optimizing the concentrations of glucose and introduction of additional copies of crtY. Error bars, mean ± s.d., n = 2

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