Measurements of extra-cellular metabolites and biomass production during transition of anaerobic cultures of E. coli MG1655 to micro-aerobic conditions.

Metabolites were quantified by NMR as described in Materials and Methods section. The values are the means from four independent cultures ±standard deviation. The errors for the pyruvate data were relative large and therefore a t-test analysis was performed which showed the 0–10 min (p = 0.053), the 10–30 min (p = 0.004), 60–120 min (p = 0.009) but not the 30–60 min (p = 0.828) were significantly different.