| name | 3 letter | 1 letter |
| Nonpolar | ||
| Alanine | ALA | A |
| Glycine | GLY | G |
| Isoleucine | ILE | I |
| Leucine | LEU | L |
| Methionine | MET | M |
| Proline | PRO | P |
| Serine | SER | S |
| Valine | VAL | V |
| Aromatic | ||
| Phenylalanine | PHE | F |
| Tryptophan | TRP | W |
| Tyrosine | TYR | Y |
| Polar (Uncharged) | ||
| Cysteine | CYS | C |
| Asparagine | ASN | N |
| Glutamine | GLN | Q |
| Threonine | THR | T |
| Basic (uncharged or + charge) | ||
| Lysine | LYS | K |
| Histidine | HIS | H |
| Arginine | ARG | R |
| Acidic (uncharged or - charge) | ||
| Aspartate | ASP | D |
| Glutamate | GLU | E |