Fig. 6From: Metabolic engineering of Clostridium thermocellum for n-butanol production from celluloseFermentation profile of strain LL1668 in a bioreactor. The strain was grown on minimal medium (MTC-5) in a bioreactor with pH regulation in the absence (a) or presence (b) of 4 g/L added ethanol. Error bars represent one standard deviation, n = 3Back to article page