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. 2014 Jul 7;9(7):e101648. doi: 10.1371/journal.pone.0101648

Figure 6. Components of the nitrogen metabolism of Ca. N. evergladensis.

Figure 6

: ammonia oxidation (4, 5), ammonia assimilation (8, 9, 10), nitrite reduction (6), nitrous oxide production (7). Reactions are mediated by the following transporters and enzymes: urea transporters, urease (1, 2), ammonia transporters (3), archaeal ammonia monooxygenase (AMO) (4), candidate enzyme: multicopper oxidase (5), nitrite reductase (NirK) (6), nitric oxide reductase (NorD, NorQ), catalytic subunit (NorB) is missing (7), glutamate dehydrogenase (8), glutamine synthetase (9), glutamate synthase (10). NO may upregulate activity of AMO. * - experimental evidences are needed.