| 1-letter | 3-letter | name | 1-letter | 3-letter | name | |
| A | Ala | Alanine | M | Met | Methionine | |
| C | Cys | Cysteine | N | Asn | Asparagine | |
| D | Asp | Aspartic acid | P | Pro | Proline | |
| E | Glu | Glutamic acid | Q | Gln | Glutamine | |
| F | Phe | Phenylalanine | R | Arg | Arginine | |
| G | Gly | Glycine | S | Ser | Serine | |
| H | His | Histidine | T | Thr | Threonine | |
| I | Ile | Isoleucine | V | Val | Valine | |
| K | Lys | Lysine | W | Trp | Tryptophan | |
| L | Leu | Leucine | Y | Tyr | Tyrosine | |
| Also | ||||||
| B | Asx | Asp or Asn | Z | Glx | Glu or Gln |