Fig. 3
Effect of butyrate or formate on the growth and final cell density of E. coli strain LW393. Cultures were grown in LB + glucose (10 g l−1) + phosphate buffer (50 mM; pH 7.0) anaerobically at 37 °C with indicated concentrations of sodium butyrate or sodium formate. Final cell density was obtained after 25 h of incubation. Solid lines, final cell density; dashed lines, growth rate; solid symbols, growth rate; open symbols, final cell density