Research Article

Effect of ADH II Deficiency on the Intracellular Redox Homeostasis in Zymomonas mobilis

Figure 1

Typical response of aerobic chemostat culture of Zymomonas mobilis Zm6 to ethanol addition. Cultivation parameters: 1 L culture volume, pH 5.5, D 0.2 h−1, air flow 2 L min−1, stirring rate 500–600 r.p.m. A burst of respiration, seen as a transient decrease of pO2 in the fermentor, takes place after addition of 1 g L−1 ethanol. Inset. The proposed scheme of generation and utilization of reducing equivalents in the ethanol cycle—two opposite, rapid ADH reactions, resulting in a slow net aerobic ethanol synthesis.
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