IUPAC codes for amino acids
(Single-letter codes based on International Union of Pure and Applied Chemistry)The information is gathered from: http://www.insdc.org/documents/feature_table.html
| One-letter abbreviation | Three-letter abbreviation | Description | 
|---|---|---|
| A | Ala | Alanine | 
| R | Arg | Arginine | 
| N | Asn | Asparagine | 
| D | Asp | Aspartic acid | 
| C | Cys | Cysteine | 
| Q | Gln | Glutamine | 
| E | Glu | Glutamic acid | 
| G | Gly | Glycine | 
| H | His | Histidine | 
| J | Xle | Leucine or Isoleucineucine | 
| L | Leu | Leucine | 
| I | ILe | Isoleucine | 
| K | Lys | Lysine | 
| M | Met | Methionine | 
| F | Phe | Phenylalanine | 
| P | Pro | Proline | 
| O | Pyl | Pyrrolysine | 
| U | Sec | Selenocysteine | 
| S | Ser | Serine | 
| T | Thr | Threonine | 
| W | Trp | Tryptophan | 
| Y | Tyr | Tyrosine | 
| V | Val | Valine | 
| B | Asx | Aspartic acid or Asparagine Asparagine | 
| Z | Glx | Glutamic acid or Glutamine Glutamine | 
| X | Xaa | Any amino acid | 
