Fig. 4.

Two extremes of Clostridium autoethanogenum metabolism during oscillatory behavior in continuous cultures. (A) Metabolism enabling growth/recovery of the oscillating culture. (B) Metabolism precrash triggering oscillations of the culture. (Left Bottom Inset) Intracellular concentrations (measured; area of circle scales with concentration) of respective redox species for biological replicate culture #1 at lowest (i.e., recovery) or highest (i.e., crash) biomass concentration levels (see Figs. 1 and 2).