| Alanine, aspartate and glutamate metabolism |
| Glycine, serine and threonine metabolism |
| Cysteine and methionine metabolism |
| Lysine biosynthesis |
| Arginine and proline metabolism |
| Histidine metabolism |
| beta-Alanine metabolism |
| Cyanoamino acid metabolism |
| Carbon fixation in photosynthetic organisms |
| Nicotinate and nicotinamide metabolism |
| Pantothenate and CoA biosynthesis |
| Nitrogen metabolism |
| Aminoacyl-tRNA biosynthesis |
| Biosynthesis of plant secondary metabolites |
| Biosynthesis of alkaloids derived from ornithine, lysine and nicotinic acid |
| Biosynthesis of plant hormones |
| Metabolic pathways |
| Biosynthesis of secondary metabolites |
| Microbial metabolism in diverse environments |
| 2-Oxocarboxylic acid metabolism |
| Biosynthesis of amino acids |
| ABC transporters |
| Two-component system |
| Bacterial chemotaxis |
| Neuroactive ligand-receptor interaction |
| Protein digestion and absorption |