| Single letter code |
Amino acid |
Three letter code |
| A |
Alanine |
Ala |
| B |
Asparagine or Aspartic acid |
ASx |
| C |
Cystine |
Cys |
| D |
Aspartic acid |
Asp |
| E |
Glutamic acid |
Glu |
| F |
Phenylalanine |
Phe |
| G |
Glycine |
Gly |
| H |
Histidine |
His |
| I |
Isoleucine |
Ile |
| K |
Lysine |
Lys |
| L |
Leucine |
Leu |
| M |
Methionine |
Met |
| N |
Asparagine |
Asn |
| P |
Proline |
Pro |
| Q |
Glutamine |
Gln |
| R |
Arginine |
Arg |
| S |
Serine |
Ser |
| T |
Threonine |
Thr |
| V |
Valine |
Val |
| W |
Tryptophan |
Trp |
| X |
Any amino acid |
Xaa |
| Y |
Tyrosine |
Tyr |
| Z |
Glutamine or Glutamic acid |
Glx |
