nitrogen compound metabolic process GO:0006807 Note that amino acid and derivative metabolism should not be annotated here. Instead use the 'amino acid and derivative metabolism' node. The chemical reactions and pathways involving organic or inorganic compounds that contain nitrogen, including (but not limited to) nitrogen fixation, nitrification, denitrification, assimilatory/dissimilatory nitrate reduction and the interconversion of nitrogenous organic matter and ammonium. biological_process nitrogen compound metabolism metabolic process