Fig. 3From: Metabolic engineering of Escherichia coli for efficient biosynthesis of butyl acetateIntracellular redox level and ATP concentration. A Relative NADH/NAD+ ratio and B ATP level normalized by the value in butanol producing strain YA1. Positive and negative value for NADH produced represents net NADH produced for a molecule butanol or butyl acetate production. T-test was performed to the experimental data. A p value larger than 0.05 is labeled as n.s.Back to article page