nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen 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metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process maintenance of cell number biosynthetic process regulation of molecular function cellular component organization cellular developmental process response to stress response to external stimulus nitrogen conitrogen compound metabolic process methylationmethylation cellular mecellular metabolic process primary metprimary metabolic process organic suborganic substance metabolic process maintenancemaintenance of cell number biosynthetibiosynthetic process regulation regulation of molecular function cellular cocellular component organization cellular decellular developmental process response toresponse to stress response toresponse to external stimulus protein binding catalytic activity, acting on a protein transferase activity protein binding catalytic activity, acting on a protein transferase activity protein binding catalytic activity, acting on a protein transferase activity 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