Main menu:
| 0000-0999 | aliphatic amino acids (alkane, alkene, alkyne and cyclic |
| 1000-2999 | single ring aromatic amino acids |
| 3000-3499 | Polycyclic aromatic amino acids |
| 3500-4499 | single ring heterocyclic amino acids |
| 4500-4999 | polycyclic heteronuclear amino acids |
| 5000-5499 | amino and alkyl amino group containing amino acids |
| 6000-6499 | guanidine and amidine containing side chains |
| 6500-6999 | hydroxy and alkoxy containing side chains |
| 7000-7499 | mercapto and alkylmercapto containing side chains |
| 7500-7999 | Other heteroatom containing side chains |
| 8000-8499 | alpha imino acids |
| 8500-8999 | non-alpha amino acids (beta and reverse beta amino acids) |
| 9000-9999 | alpha amino acids lacking either the alpha amino or alpha carboxyl groups, amino alcohols and alpha hydroxy acids |