TABLE 4.

Succinate dehydrogenase activity of C. jejuni cell extracts

OD600	Succinate dehydrogenase activity (μmol DCPIP reduced min−1 mg−1)
	Wild type	frdA::cat+ strain	sdhA::cat+ strain
0.1	11 ± 4	2 ± 1	18 ± 2
0.2	14 ± 4	2 ± 1	24 ± 5
0.3	56 ± 17	2 ± 1	59 ± 18
0.5	87 ± 34	NDa	55 ± 21
0.5 (with pyruvate)	56 ± 20	4 ± 4	69 ± 19

^aND, not done.