Amino Acids
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Standard Amino Acid Abbreviations and Side Chain Properties
| Amino Acid | 3-Letter | 1-Letter | Side chain polarity | Side chain acidity or basicity |
|---|---|---|---|---|
| Alanine | Ala | A | nonpolar | neutral |
| Arginine | Arg | R | polar | strongly basic |
| Asparagine | Asn | N | polar | neutral |
| Aspartic acid | Asp | D | polar | acidic |
| Cysteine | Cys | C | polar | neutral |
| Glutamic acid | Glu | E | polar | acidic |
| Glutamine | Gln | Q | polar | neutral |
| Glycine | Gly | G | nonpolar | neutral |
| Histidine | His | H | polar | weakly basic |
| Isoleucine | Ile | I | nonpolar | neutral |
| Leucine | Leu | L | nonpolar | neutral |
| Lysine | Lys | K | polar | basic |
| Methionine | Met | M | nonpolar | neutral |
| Phenylalanine | Phe | F | nonpolar | neutral |
| Proline | Pro | P | nonpolar | neutral |
| Serine | Ser | S | polar | neutral |
| Threonine | Thr | T | polar | neutral |
| Tryptophan | Trp | W | nonpolar | neutral |
| Tyrosine | Tyr | Y | polar | neutral |
| Valine | Val | V | nonpolar | neutral |