. "464795"^^ . "CITRULLINEPTFDA29VT07BGDA" . . "Amino Acid, Peptide, or Protein"^^ . "C0008864"^^ . "27425"^^ . . . "CHEBI:16349"^^ . "464795"^^ . . "L-CitrullineSYNCI" . "C6H13N3O3"^^ . "N5-(Aminocarbonyl)-L-ornithineSNNCI" . "CitrullinePTNCI" . . "A non-essential amino acid. In hepatocytes, L-citrulline is synthesized in the urea cycle by the addition of carbon dioxide and ammonia to ornithine. L-citrulline is converted into L-arginine by the enzymes argininosuccinate synthetase and argininosuccinate lyase in the presence of L-aspartate and ATP. Subsequently, L-arginine is converted to nitric oxide by nitric oxide synthase and L-citrulline is regenerated as a by-product.NCI" . "Citrulline"^^ . "C53406"^^ . "29VT07BGDA"^^ . "2-Amino-5-(carbamoylamino)pentanoic AcidSNNCI" . "FDA"^^ . "372-75-8"^^ . "Pharmacologic Substance"^^ . "Citrulline"^^ . "Citrulline"^^ .