Figure 1
Effect of CO2 fixation genes expression on the cell growth (a), glucose consumption (b), the succinate production (c), relative expression levels of ppc and pck (d) and the enzyme activities of the PCK and PPC (e) in fed-batch fermentation. Symbols for E. coli strains: Tang1501 (pACYC184) (open triangle, 
), Tang1502 (ppc) (black triangle, 
), Tang1503 (pck) (open circle, ○), Tang1504 (ppc and pck) (black circle, 
). Error bars show standard deviation (n = 3). Different letters (e.g., a–c) were assigned to significantly different groups and for the results between two groups, a combination of the two corresponding letters was used (e.g., a,b).
