TABLE 5.

Nitrogenase activity of wild-type R. palustris and hydrogen-producing mutantsa

StrainNitrogenase activity (nmol C2H4 formed/min/mg protein) under the following conditionsb:
Non-nitrogen-fixingNitrogen-fixing
CGA009<1112 ± 25
CGA57082 ± 25144 ± 25
CGA57146 ± 754 ± 20
CGA5725 ± 259 ± 21
CGA57462 ± 4792 ± 11

  • ↵a Cells were grown with 20 mM acetate.

  • ↵b Data are averages ± standard deviations for at least three independent measurements.