Enzymic cycle between ammonia and nitrate.
D000641:Ammonia / Q000378:metabolism*; D001669:Biochemical Phenomena; D004798:Enzymes / Q000737:chemistry*; D009566:Nitrates / Q000378:metabolism*; D009589:Nitrogen Oxides
D004798:Enzymes; D009566:Nitrates; D009589:Nitrogen Oxides; D000641:Ammonia
AMMONIA/metabolism; ENZYMES/chemistry; NITRATES/metabolism