TABLE 5.

Levels of spectral complexes present under aerobic conditions in strains of R. sphaeroides 2.4.1

Strain	Relevant characteristics	Level (nmol/mg of crude membrane protein; avg ± SD [n ≥ 3])
		B800-850	B875
2.4.1(pRK415)	Wild type (plasmid vector)	NDa	0.75 ± 0.14
JZ1678(pRK415)	ΔfnrL::ΩKmr (plasmid vector)	ND	0.11 ± 0.01
2.4.1(pUI1650*)	Wild type (prrB78* allele)	0.55 ± 0.15	3.24 ± 0.64
JZ1678(pUI1650*)	ΔfnrL::ΩKmr (prrB78* allele)	0.37 ± 0.13	3.38 ± 0.49
2.4.1(pUI1649)	Wild type (wild type prrB)	0.16 ± 0.11	1.82 ± 0.25
JZ1678(pUI1649)	ΔfnrL::ΩKmr (wild type prrB)	0.06 ± 0.04	1.06 ± 0.24

^aND, none detected.