regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of biological quality system process cell communication cellular response to stimulus nitrogen compound metabolic process cellular metabolic process primary metabolic process organic substance metabolic process regulation of bioregulation of biological quality system processsystem process cell communicatiocell communication cellular responsecellular response to stimulus nitrogen compoundnitrogen compound metabolic process cellular metabolicellular metabolic process primary metabolicprimary metabolic process organic substanceorganic substance metabolic process signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activity protein binding signaling receptor activitysignaling receptor activity protein bindingprotein binding cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cell organelle membrane cellcell organelleorganelle membranemembrane