Fig. 2.
Genome cartoon of three representative candidate sulfate reducers. The cartoon displays metabolic pathways encoded by a Chloroflexi (orange), Desulfobacteraceae (yellow), and Nitrospiraceae (blue) genome. The abbreviations and chemical formulae are as follows: SO42−, sulfate; Sat, sulfate adenylyltransferase; APS, adenosine 5′-phosphosulfate; AprBA, APS reductase subunits A and B; SO32−, sulfite; DsrAB, dissimilatory sulfite reductase subunits A and B; PEP, phosphoenolpyruvate; PK, pyruvate orthophosphate dikinase, PW: pyruvate water dikinase; ADH, alcohol dehydrogenase; LDH, lactate dehydrogenase; PDH, pyruvate dehydrogenase; PFOR, pyruvate ferredoxin oxidoreductase; AFOR, acetaldehyde ferredoxin oxidoreductase; ALDH, aldehyde dehydrogenase; ACS, acetate synthetase; HCOO−, formate; FDH, formate dehydrogenase; CO2, carbon dioxide; H2, hydrogen; Hase, nickel-iron hydrogenase; H+, proton; NDH, NADH dehydrogenase; SDH, succinate dehydrogenase; cytbd, cytochrome bd; cytaa3, aa3-type cytochrome; TCA, tricarboxylic acid cycle; N2O, nitrous oxide; NosZ, nitrous oxide reductase; N2, dinitrogen; NarGHI, nitrate reductase; NirBD, cytoplasmic, ammonia-forming nitrite reductase; NrfAH, membrane-bound, ammonia-forming nitrite reductase; NO2−, nitrite; NH3, ammonia