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. 2003 Aug;185(15):4564–4571. doi: 10.1128/JB.185.15.4564-4571.2003

FIG. 2.

FIG. 2.

Fe(III) reduction by wild-type S. frigidimarina. A color change from black to yellow in the medium is an indication of Fe(III) reduction, as observed when S. frigidimarina cells were grown with ferric citrate or with fumarate and ferric citrate as electron acceptors but not when S. frigidimarina cells were grown with nitrate and ferric citrate as respiratory substrates.