The reduction of nitrate to dinitrogen by four reactions; each intermediate is transformed to the next lower oxidation state; also part of cellular bioenergetics; the nitrogen compounds can serve as terminal acceptors for electron transport phosphorylation in place of oxygen. [ https://biocyc.org/META/NEW-IMAGE?type=NIL&object=DENITRIFICATION-PWY ]
This is just here as a test because I lose it