TABLE 3.
Minimum ethanolamine for wild type
| pH | Growtha on ethanolamine as a carbon source at the indicated concn of total ethanolamine (mM)b
|
|||||
|---|---|---|---|---|---|---|
| 0.25 | 0.5 | 1 | 2.5 | 5 | 10 | |
| 5.5 | 0 (0.026) | 0 (0.05) | 0 (0.10) | 1+ (0.26) | 1+ (0.52) | 2+ (1.0) |
| 6.0 | 0 (0.10) | 0 (0.20) | 1+ (0.41) | 1+ (0.81) | 2+ (1.6) | 3+ (3.2) |
| 6.5 | 0 (0.26) | 1+ (0.51) | 1+ (1.0) | 2+ (2.6) | 3+ (5.2) | 4+ (10) |
a
Growth on ethanolamine as the carbon source was scored qualitatively on an increasing scale from no growth (0) to strong growth (4+).
b
Total concentration of ethanolamine in plates regardless of charge. The concentrations (in micromolar units) of Eth0 at the indicated pHs were calculated by using the Henderson-Hasselbach equation and are presented in parentheses.