| Purine metabolism |
| Pyrimidine metabolism |
| Alanine, aspartate and glutamate metabolism |
| Arginine and proline metabolism |
| D-Glutamine and D-glutamate metabolism |
| Glyoxylate and dicarboxylate metabolism |
| Nitrogen metabolism |
| Aminoacyl-tRNA biosynthesis |
| Biosynthesis of plant secondary metabolites |
| Metabolic pathways |
| Microbial metabolism in diverse environments |
| Biosynthesis of amino acids |
| ABC transporters |
| Two-component system |
| Glutamatergic synapse |
| GABAergic synapse |
| Proximal tubule bicarbonate reclamation |
| Protein digestion and absorption |
| Mineral absorption |