Table 2.

Dissimilatory nitrate and elemental sulfur reduction and related genes in genome-sequenced Deferribacteres.

Microorganism 1	Nitrate Reduction	Product	napMADGH	narGHJI	nrfA	hao	hcp	otr	S0 Reduction	psrABC
Calditerrivibrio nitroreducens	+	NH4+	+	-	+	-	+	-	-	+
Deferribacter autotrophicus	+	NH4+	+	-	-	+	+	+	+	+++
Deferribacter desulfuricans	+	NO2−	+	+	-	+	+	-	+	+++
Denitrovibrio acetiphilus	+	NH4+	+	+	-	+	+	-	-	++
Flexistipes sinusarabici	nt	nt	+	-	-	+	+	-	-	++
Geovibrio thiophilus	+	NO2−, NH4+	+	+	-	-	+	-	+	++
Mucispirillum schaedleri	-	-	+	-	+	-	-	-	nt	-
Seleniivibrio woodruffii	-	-	+	+	+	+	+	-	-	+++

¹ Data are presented for the type strains; nt—not tested. Gene abbreviations: nap—periplasmic nitrate reductase, nar—nitrate reductase, nrfA—ammonifying nitrite reductase, hao—hydroxylamine oxidoreductase, hcp—hydroxylamine reductase, otr—octaheme tetrathionate reductase, and psrABC—polysulfide reductase (the number of + corresponds to the number of psrABC clusters).