20 standard amino acids
| amino acid name | 3-letter code | 1-letter code |
| Alanine | ALA | A |
| Argenine | ARG | R |
| Asparagine | ASN | N |
| Aspartate | ASP | D |
| Cystein | CYS | C |
| Glutamate | GLU | E |
| Glutamine | GLN | Q |
| Glycine | GLY | G |
| Histidine | HIS | H |
| Isoleucine | ILE | I |
| Leucine | LEU | L |
| Lysine | LYS | K |
| Methionine | MET | M |
| Phenylalanine | PHE | F |
| Proline | PRO | P |
| Serine | SER | S |
| Threonine | THR | T |
| Tryptophane | TRP | W |
| Tyrosine | TYR | Y |
| Valine | VAL | V |