Fig 4. Glucose competition.

Results of glucose competition experiments, where the medium contained a mixture of ¹²C-glucose and ¹³C-glucose. Profiles of total glucose concentration and labeling ratio are shown for the WT (A) and one representative ALE strain culture (B). The estimated glucose preference factor “f” reflects the preference for ¹²C-glucose vs. ¹³C-glucose (C). An f-value of 1 reflects no preference, greater than one reflects a preference for ¹²C-glucose, and less than one a preference for ¹³C-glucose.