nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound metabolic process methylation cellular metabolic process primary metabolic process organic substance metabolic process response to stress cellular response to stimulus nitrogen compound menitrogen compound metabolic process methylationmethylation cellular metabolic pcellular metabolic process primary metabolic prprimary metabolic process organic substance meorganic substance metabolic process response to stressresponse to stress cellular response tocellular response to stimulus transferase activity 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 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 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 protein binding catalytic activity, acting on a protein transferase activitytransferase activity protein bindingprotein binding catalytic activity, acting on a proteincatalytic activity, acting on a protein