Fig 2. OD₆₆₀ values for 1 mL cultures of R. rubrum mutant strains compared to WT.

The striped bars represent OD₆₆₀ values reached under anaerobic growth conditions and the grey bars indicate OD₆₆₀ values after reaching semi-aerobic growth conditions. All anaerobic cultures were grown five days at 30°C, and semi-aerobic cultures were harvested after 2.5 days. No growth occurred in ΔrquA under anaerobic conditions.