TABLE 1.
Kinetic constants for hydrogen and sulfate uptake of Thermodesulfovibrio sp. strain R1Ha3 and Thermodesulfobacterium sp. strain JSP
| Strain | Sulfate kinetics (mean ± SD)
|
Hydrogen kinetics (mean ± SD)
|
||||||
|---|---|---|---|---|---|---|---|---|
| Km (μM) | Vmaxa | Threshold (μM) | nd | Km (μM) | Vmax | Threshold (atm) (10−5) | nd | |
| R1Ha3 | 3.0 ± 1.1 | 99 ± 63 | 1.8 ± 0.1 | 5 | 2.4 ± 1.9 | 157 ± 43b | 1.2 ± 0.7 | 3 |
| JSP | 3.1 ± 1.3 | 59 ± 7 | 1.9 ± 0.1 | 4 | 1.9 ± 0.7 | 1.9 ± 0.4c | 0.49 ± 0.3 | 3 |
a
Expressed as micromoles of sulfate per milligram (dry weight) of cells per hour.
b
Expressed as micromoles of hydrogen per milligram (dry weight) of cells per hour.
c
Expressed as nanomoles of hydrogen per 106 cells per hour.
d
n, number of experiments.