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. 2017 Nov 1;3(11):e1700807. doi: 10.1126/sciadv.1700807

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Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 2 — ETF, electron-transport flavoprotein; hmp, NO dioxygenase; HYD, hydrogenase; NirBD, assimilatory nitrite reductase; NirK, copper-containing nitrite reductase (NO-forming); NXR, nitrite oxidoreductase; sNOR, NO reductase; PHB, polyhydroxybuterate; poly-P, polyphosphates; SOR, sulfite dehydrogenase; SQR, sulfide/quinone oxidoreductase; PPP, pentose phosphate pathway; TRAP, tripartite ATP-independent periplasmic transporter (TRAP-T); TRK, K⁺ transporter; RND, resistance-nodulation-division; ATPase, adenosine triphosphatase; ABC, ATP-binding cassette. Enzyme complexes of the electron transport chain are labeled by Roman numerals. Red and orange diamonds represent cytochrome c proteins and quinones, respectively. The legend indicates transport protein classifications.