Table 1.

Cultivation conditions for Geobacter sulfurreducens to study intracellular metabolism with different electron donor/acceptor conditions.

ID	E1	E2	E3	E4
cultivation mode	chemostat (D = 0.04 h-1)	batch	chemostat (D = 0.05 h-1)	chemostat (D = 0.05 h-1)
e-donor	5 mM acetate	1 mM acetate & 10 mL H2*	5 mM acetate	10 mM acetate
e-acceptor	55 mM Fe(III)citrate	55 mM Fe(III)citrate	28 mM fumarate	20 mM fumarate

*: H₂ was provided in the headspace of the culture (initial partial pressure ~ 0.60 atm).