TABLE 3.

Cellular concentrations of NADH and NAD⁺ and NADH/NAD⁺ redox ratio as a function of the aeration conditions^a

Aeration conditions	Cofactor concn (mM)		NADH/NAD+ redox ratio
	NADH	NAD+
Anaerobic	0.171 ± 0.024	3.00 ± 0.47	0.057 ± 0.012
Microaerobic	NDb	4.23 ± 0.43	ND
Aerobic	0.110 ± 0.015	5.95 ± 0.53	0.019 ± 0.003

^aThe values are means ± standard deviations for at least four independent cell samples for each type of conditions.

^bND, not determined.