Glucose and glycerol metabolism in E. faecalis W11. W11 was cultured in M-MRS broth containing either 50 mM glucose (A) or 100 mM glycerol (B) under aerobic (●, ▲) or anaerobic (○, △) conditions. ● and ○, optical density at 600 nm; ▲ and △, concentration of the carbon source in the culture medium. The results are representative, and the experiment was performed at least three times.