TABLE 3.
Rates and affinities of H2 uptake among various pathogenic bacteriaa
| Organism (strain) | Uptake activity (nmol H2 min−1 [109 cells]−1) | Apparent Km (μM) | Key reference |
|---|---|---|---|
| Campylobacter concisus (13826) | 113 ± 6 | NA | 78 |
| Campylobacter concisus (51562) | 199 ± 9 | NA | 78 |
| Helicobacter pylori (26695) | 33 ± 4 | 1.8 | 9 |
| Helicobacter pylori (43505) | 37 ± 2 | 1.8 | 9 |
| Helicobacter hepaticus (51449) | 3.2 ± 0.2 | 2.5 | 10 |
| Salmonella Typhimurium (14028s) | 12 ± 2 | 2.1 | 8 |
| Shigella flexneri | 68 ± 12 | NA | 251 |
a
H2 uptake activities are expressed as means ± standard deviations. All activities reported in this table were determined amperometrically with whole cells using O2 provided as the terminal electron acceptor. NA, affinity not measured.