Fig. 4From: Metabolic engineering of the l-serine biosynthetic pathway improves glutathione production in Saccharomyces cerevisiaeGlutathione production by GCI/Vector, GCI/SER3, and GCI/SER33 strains overexpressing SHM2 and/or CYS4 genes. A Biomass concentration (g/L). B Intracellular glutathione content (%). C Volumetric glutathione production (mg/L). D GSSG ratio (%). Blue and red filled bars represent the values after growth for 24 and 48 h, respectively. Values are the mean, and error bars show the standard deviation (n = 3)Back to article page