TABLE 2.

Anaerobic reduction of various electron acceptors by wild-type MR-1 and the mutant SR-21^a

Electron acceptor	Reduction by:
	MR-1	SR-21
Fe(III)	+	−
Mn(IV)	+	−
Nitrate	+	+
Nitrite	+	+
Fumarate	+	+
DMSO	+	+
TMAO	+	+
Thiosulfate	+	+
Sulfite	+	+

^a−, no reduction; +, reduction.