TABLE 4.

Hydrogen production by R. palustris mutants grown with ammoniuma

StrainHydrogen production (μmol/mg protein)b
Cyclohexanecarboxylatep-CoumarateAcetate
CGA570260 ± 55149 ± 6632 ± 23
CGA571164 ± 36255 ± 81104 ± 48
CGA572151 ± 30130 ± 4017 ± 7
CGA57475 ± 38332 ± 8297 ± 38
CGA009 (NF)c47 ± 886 ± 2636 ± 5
  • a Data were acquired from exponentially growing cultures (optical density at 660, 0.2 to 0.5).

  • b Concentrations of carbon sources are as in Table 2. Numbers represent the averages ± standard deviations for at least three independent measurements.

  • c Hydrogen production by wild-type cells grown with nitrogen gas and acetate (nitrogen-fixing conditions [NF]) is shown for comparison (data are from Table 2).