nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound metabolic process catabolic process cellular metabolic process primary metabolic process small molecule metabolic process organic substance metabolic process methylation nitrogen compound menitrogen compound metabolic process catabolic processcatabolic process cellular metabolic pcellular metabolic process primary metabolic prprimary metabolic process small molecule metabsmall molecule metabolic process organic substance meorganic substance metabolic process methylationmethylation transferase activity transferase activity transferase activity transferase activity transferase activity transferase activity transferase activity transferase activity transferase activity transferase activity transferase activitytransferase activity cell organelle cell organelle cell organelle cell organelle cell organelle cell organelle cell organelle cell organelle cell organelle cell organelle cellcell organelleorganelle