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(biochemistry) Abbreviation of anaerobic ammonium oxidation, a part of the nitrogen cycle.

Figure 2. The biological nitrogen cycle, with dissimilatory nitrate reduction to ammonium

(biochemistry) Abbreviation of anaerobic ammonium oxidation, a part of the nitrogen cycle.

Figure 3. Possible biochemical pathway and cellular localization of the enzyme systems involved in anammox reaction.

(biochemistry) Abbreviation of anaerobic ammonium oxidation, a part of the nitrogen cycle.

Figure 4. Hypothetical metabolic pathways and reversed electron transport in the anammoxosome. (a) Anammox catabolism that uses nitrite as the electron acceptor for the creation of a proton motive force over the anammoxosomal membrane. (b) Proton motive force- driven reversed electron transport combines central catabolism with nitrate reductase (NAR) to generate ferredoxin for carbon dioxide reduction in the acetyl-CoA pathway. HAO, hydrazine oxidoreductase; HD, hydrazine dehydrogenase; HH, hydrazine hydrolase; NIR, nitrite oxidoreductase; Q, quinine. Light blue diamonds, cytochromes; blue arrows, reductions; pink arrows, oxidations.