Fig. 4From: The significance of aspartate on NAD(H) biosynthesis and ABE fermentation in Clostridium acetobutylicum ATCC 824NAD+, NADH and total NAD(H) concentration of C. acetobutylicum ATCC 824 with or without aspartate (2.0 g/L). The data are the means and standard deviations of three replicates (**P ≤ 0.01; t-test)Back to article page