Table 3.

Metabolites and sulfur isotope fractionation in continuous cultures of wild-type Desulfovibrio vulgaris Hildenborough and CycA mutant.

Initial culture medium	Strain, genotype	Concentration in culture medium					Cell specific consumption/production rate (fmol/cell/day)				34ε (‰)
		Cell density (108 cells/ml)	Pyruvate (mM)	Sulfate (mM)	Sulfide (mM)	Acetate (mM)	Pyruvate	Sulfide	Acetate	H2
20 mM pyruvate	WT	1.2	<0.1	19.7	2.3	10.5	78.4	8.9	41.2	0.03	35.5
21 mM sulfate	JW9087, ΔcycA	1.6	0.3	20.4	1.1	18.5	71.9	3.9	67.4	41.5	32.4