Table 4.

β-Galactosidase activities from cell extracts ofR. sphaeroides strains containingpuc::lacZ (pCF200Km) orpuf::lacZ (pUI1663) fusion plasmid

Mutationaβ-Galactosidase activity (nmol/min/mg of protein)b
puc::lacZpuf::lacZ
None (2.4.1)221 ± 24279 ± 15
rdxB980 ± 12769 ± 30
rdxH1,427 ± 11,291 ± 99
rdxI1,187 ± 281,381 ± 38
rdxS900 ± 12927 ± 43
  • a Strains were grown aerobically with sparging of 69% N2–30% O2–1% CO2 to an A600 of 0.2.

  • b Average of two independent experiments.