| GENERAL REFERENCE INFORMATION |
Common Amino Acids, Their Symbols, and Molecular Weights |
| peptides |
| Amino Acid | Three Letter Code | Single Letter Code | Molecular Weight |
| Alanine | Ala | A | 71.08·18.02 |
| Arginine | Arg | R | 156.19·18.02 |
| Aspartic Acid | Asp | D | 115.09·18.02 |
| Asparagine | Asn | N | 114.10·18.02 |
| Cysteine | Cys | C | 102.14·18.02 |
| Glutamic Acid | Glu | E | 129.12·18.02 |
| Glutamine | Gln | Q | 128.13·18.02 |
| Glycine | Gly | G | 57.05·18.02 |
| Histidine | His | H | 137.14·18.02 |
| Hydroxyproline | Hyp | - | 113.05·18.02 |
| Isoleucine | Ile | I | 113.06·18.02 |
| Leucine | Leu | L | 113.06·18.02 |
| Lysine | Lys | K | 128.18·18.02 |
| Methionine | Met | M | 131.20·18.02 |
| Norleucine | Nle | - | 113.06·18.02 |
| Ornithine | Orn | - | 114.15·18.02 |
| Phenylalanine | Phe | F | 147.18·18.02 |
| Proline | Pro | P | 97.12·18.02 |
| Pyroglutamic Acid | pGlu or Pyr | < E | 111.03·18.02 |
| Sarcosine | Sar | - | 71.08·18.02 |
| Serine | Ser | S | 87.08·18.02 |
| Threonine | Thr | T | 101.11·18.02 |
| Tryptophan | Trp | W | 186.22·18.02 |
| Tyrosine | Tyr | Y | 163.18·18.02 |
| Valine | Val | V | 99.13·18.02 |
Residues color coded by side chain properties
| Non-Polar | Polar | Basic | Acidic |
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