| Arginine and proline metabolism |    |
| beta-Alanine metabolism |    |
| Nitrogen metabolism |    |
| Purine metabolism |    |
| Tyrosine metabolism |    |
| Citrullinemia Type I |    |
| Carbamoyl Phosphate Synthetase Deficiency |    |
| Argininosuccinic Aciduria |    |
| Transcription/Translation |    |
| Urea Cycle |    |
| Aspartate Metabolism |    |
| Glutamate Metabolism |    |
| Malate-Aspartate Shuttle |    |
| 2-Hydroxyglutric Aciduria (D And L Form) |    |
| Adenosine Deaminase Deficiency |    |
| Adenylosuccinate Lyase Deficiency |    |
| AICA-Ribosiduria |    |
| Alkaptonuria |    |
| Canavan Disease |    |
| Guanidinoacetate Methyltransferase Deficiency (GAMT Deficiency) |    |
| Hawkinsinuria |    |
| Hypoacetylaspartia |    |
| Molybdenum Cofactor Deficiency |    |
| Ornithine Transcarbamylase Deficiency (OTC Deficiency) |    |
| Prolidase Deficiency (PD) |    |
| Prolinemia Type II |    |
| Purine Nucleoside Phosphorylase Deficiency |    |
| Tyrosinemia Type I |    |
| Xanthine Dehydrogenase Deficiency (Xanthinuria) |    |
| 4-Hydroxybutyric Aciduria/Succinic Semialdehyde Dehydrogenase Deficiency |    |
| Hyperinsulinism-Hyperammonemia Syndrome |    |
| GABA-Transaminase Deficiency |    |
| Argininemia |    |
| Hyperprolinemia Type II |    |
| Hyperprolinemia Type I |    |
| Arginine: Glycine Amidinotransferase Deficiency (AGAT Deficiency) |    |
| Ornithine Aminotransferase Deficiency (OAT Deficiency) |    |
| Lesch-Nyhan Syndrome (LNS) |    |
| Gout or Kelley-Seegmiller Syndrome |    |
| Homocarnosinosis |    |
| Azathioprine Action Pathway |    |
| Mercaptopurine Action Pathway |    |
| Disulfiram Action Pathway |    |
| Thioguanine Action Pathway |    |
| Ureidopropionase Deficiency |    |
| Carnosinuria, carnosinemia |    |
| Tyrosinemia, transient, of the newborn |    |
| Dopamine beta-hydroxylase deficiency |    |
| Creatine deficiency, guanidinoacetate methyltransferase deficiency |    |
| Hyperornithinemia with gyrate atrophy (HOGA) |    |
| Hyperornithinemia-hyperammonemia-homocitrullinuria [HHH-syndrome] |    |
| L-arginine:glycine amidinotransferase deficiency |    |
| Xanthinuria type I |    |
| Xanthinuria type II |    |
| Monoamine oxidase-a deficiency (MAO-A) |    |
| Adenine phosphoribosyltransferase deficiency (APRT) |    |
| Mitochondrial DNA depletion syndrome |    |
| Myoadenylate deaminase deficiency |    |
| Succinic semialdehyde dehydrogenase deficiency |    |
| Glutaminolysis and Cancer |    |
