Source: World Intellectual Property Organization (WIPO) Handbook on Industrial Property Information and Documentation, Standard ST.25: Standard for the Presentation of Nucleotide and Amino Acid Sequence Listings in Patent Applications (2009).
| Symbol
| Meaning
|
|---|
| Ala | Alanine.
|
| Cys | Cysteine.
|
| Asp | Aspartic Acid.
|
| Glu | Glutamic Acid.
|
| Phe | Phenylalanine.
|
| Gly | Glycine.
|
| His | Histidine.
|
| Ile | Isoleucine.
|
| Lys | Lysine.
|
| Leu | Leucine.
|
| Met | Methionine.
|
| Asn | Asparagine.
|
| Pro | Proline.
|
| Gln | Glutamine.
|
| Arg | Arginine.
|
| Ser | Serine.
|
| Thr | Threonine.
|
| Val | Valine.
|
| Trp | Tryptophan.
|
| Tyr | Tyrosine.
|
| Asx | Asp or Asn.
|
| Glx | Glu or Gln.
|
| Xaa | unknown or other. |
source: 24 FR 10332, Dec. 22, 1959, unless otherwise noted.