TABLE 1.

Carbon source utilization/production following anaerobic growth in SBM containing 20 mM lactate or pyruvate and 40 mM fumarate^a

Carbon source	Carbon source utilization/production (mM) by the indicated strain with:
	20 mM lactate-40 mM fumarate			20 mM pyruvate-40 mM fumarate
	MR-1	Δfdh mutant	Δfdh Δpdh mutant	MR-1	Δfdh mutant	Δfdh Δpdh mutant
Lactate	−20.2 ± 0.0	−14.7 ± 0.2	−12.2 ± 0.2	ND	ND	ND
Pyruvate	0.8 ± 0.0	4.0 ± 0.1	4.0 ± 0.1	−22.2 ± 0.0	−13.0 ± 0.7	−11.4 ± 0.2
Acetate	18.0 ± 0.3	12.0 ± 0.3	9.1 ± 0.1	19.7 ± 0.2	11.8 ± 0.3	8.1 ± 0.1
Formate	ND	7.1 ± 0.2	6.4 ± 0.1	ND	5.7 ± 0.6	5.8 ± 0.0
Fumarate	−39.2 ± 0.0	−18.3 ± 0.2	−14.2 ± 0.2	−20.4 ± 0.8	−6.4 ± 2.2	−2.0 ± 0.0
Succinate	38.2 ± 0.5	18.8 ± 0.6	13.6 ± 0.2	21.3 ± 0.4	4.9 ± 0.6	2.5 ± 0.1

^aReported concentrations are averages ± SEM from three independent experiments. ND, not detected.