Fig. 2

Fermentation performance of the recombinants Z. mobilis ZM4(pHW20a-ZMO1771-udhA) and ZM4(pHW20a-ZMO1771) in corn stover hydrolysate. ZM4(pHW20a-ZMO1771-udhA), co-expressing gene udhA with ZMO1771; ZM4(pHW20a-ZMO1771), expressing gene ZMO1771 only. a Cell growth indicated by the OD value at 600 nm. b Conversion of furan inhibitors. c Glucose consumption and ethanol production. Conditions: 30 °C, static culture. The corn stover hydrolysate was prepared using the freshly dry dilute acid pretreated corn stover materials. The hydrolysate contained 59.45 g/L of glucose, 24.03 g/L of xylose, 3.21 g/L of acetic acid, 0.38 g/L of HMF, and 0.69 g/L of furfural. Mean values were presented with error bars representing at least two standard deviations