TABLE 2.

pH in competition culturesa

Day(s) of growthpH of culture grown with:
50 mM Fumarate50 mM Acetate50 mM Pyruvate50 mM Glycerol0.5% GlucoseKornberg K2HPO4bKornberg AMPSOb
+Glucose−Glucose+Glucose−Glucose
07.27.07.07.06.86.86.89.09.0
17.27.27.26.45.66.86.88.59.0
27.27.27.25.85.66.86.89.09.0
37.27.57.24.85.66.86.89.09.0
47.28.07.24.85.86.86.89.09.0
57.28.07.25.15.86.86.89.09.0
67.58.07.55.15.86.86.89.09.0
77.78.07.55.25.86.86.89.09.0
87.78.07.75.25.86.86.89.09.0
97.78.07.55.25.86.86.89.09.0
107.78.07.55.25.86.86.89.09.0
  • a By using indicator strips, the pH was monitored in competition cultures between DS17 (uvrY) and DS17 wild-type strains grown in minimal medium and in two different Kornberg media supplemented with the indicated carbon sources.

  • b The pH with 0.5% glucose (+Glucose) and the pH without glucose (−Glucose) are shown.