TABLE 4.

Genes encoding electron transport proteins that are not c-type cytochromes and that were differentially expressed in F. placidus cells^a

Locus ID	Gene product	Fold upregulated
Ferp_0125	Cupredoxin superfamily protein	2.49
Ferp_0140	Heterodisulfide oxidoreductase, iron-sulfur cluster-binding subunit B	2.10
Ferp_0349	Ferredoxin	2.16
Ferp_0602	Formylmethanofuran dehydrogenase, bis-(molybdopterin guanine dinucleotide)-oxotungsten-binding subunit B	2.11
Ferp_0603	Formylmethanofuran dehydrogenase, subunit A	3.54
Ferp_0604	Formylmethanofuran dehydrogenase, subunit C	2.32
Ferp_0728	Formylmethanofuran dehydrogenase, iron-sulfur cluster-binding subunit G	2.19
Ferp_1088	Oxidoreductase, membrane protein subunit	2.30
Ferp_1256	Phenylacetyl-coenzyme A dehydrogenase, iron-sulfur cluster-binding subunit	2.02
Ferp_1268	Menaquinol oxidoreductase complex Cbc4, iron-sulfur cluster-binding subunit, putative	2.43
Ferp_1269	Menaquinol oxidoreductase complex Cbc4, cytochrome b subunit, putative	2.72
Ferp_1300	2-Oxoacid:ferredoxin oxidoreductase, small subunit	2.14
Ferp_1437	Menaquinol oxidoreductase complex Cbc4, cytochrome b subunit, putative	2.17
Ferp_1687	Electron transfer flavoprotein, beta subunit	2.27
Ferp_1688	Electron transfer flavoprotein, alpha subunit	2.63
Ferp_1705	Coenzyme F420:quinone oxidoreductase, membrane protein subunit M, putative	2.09
Ferp_1707	Coenzyme F420:quinone oxidoreductase, membrane protein subunit N, putative	2.23
Ferp_1709	Coenzyme F420:quinone oxidoreductase, subunit BC, putative	3.58
Ferp_1710	Coenzyme F420:quinone oxidoreductase, subunit D, putative	2.38
Ferp_1711	Coenzyme F420:quinone oxidoreductase, membrane protein subunit H, putative	2.49
Ferp_1712	Coenzyme F420:quinone oxidoreductase, iron-sulfur cluster-binding subunit I, putative	2.44
Ferp_1940	Electron transfer flavoprotein, alpha subunit	2.13
Ferp_2216	Sulfate adenylyltransferase	2.32
Ferp_2218	Adenosine-5′-phosphosulfate reductase, FAD-binding catalytic alpha subunit	3.01
Ferp_2220	Oxidoreductase, iron-sulfur cluster-binding subunit	2.83
Ferp_2377	Oxidoreductase domain protein	2.32

^aShown are genes encoding electron transport proteins that are not c-type cytochromes and that were differentially expressed in F. placidus cells grown with acetate as the electron donor and either insoluble Fe(III) oxide or soluble Fe(III) citrate as the electron acceptor.