Fig. 6

Measurement of the extracellular carbohydrate in the culture medium. Extracellular carbohydrate measured in the culture medium of the wild type (WT), SbtA-overexpressing (A) and BicA-overexpressing (B) strains was measured after 5 days of growth with bubbling of air, 1% CO2 or 3% CO2. * represents a statistically significant difference from the wild-type cells grown under similar CO2 level, n = 3