Amino acid Table of standard amino acid abbreviations and properties Table of standard amino acid abbreviations and properties

| Amino_Acid | _3_Letter | _1_Letter | Side_chain_polarity | Side_chain_charge_pH_7_4 | Hydropathy_index |
|---|---|---|---|---|---|
| Alanine | Ala | A | nonpolar | neutral | 1.8 |
| Arginine | Arg | R | Basic polar | positive | −4.5 |
| Asparagine | Asn | N | polar | neutral | −3.5 |
| Aspartic acid | Asp | D | acidic polar | negative | −3.5 |
| Cysteine | Cys | C | nonpolar | neutral | 2.5 |
| Glutamic acid | Glu | E | acidic polar | negative | −3.5 |
| Glutamine | Gln | Q | polar | neutral | −3.5 |
| Glycine | Gly | G | nonpolar | neutral | −0.4 |
| Histidine | His | H | Basic polar | positive(10%) neutral(90%) | −3.2 |
| Isoleucine | Ile | I | nonpolar | neutral | 4.5 |
| Leucine | Leu | L | nonpolar | neutral | 3.8 |
| Lysine | Lys | K | Basic polar | positive | −3.9 |
| Methionine | Met | M | nonpolar | neutral | 1.9 |
| Phenylalanine | Phe | F | nonpolar | neutral | 2.8 |
| Proline | Pro | P | nonpolar | neutral | −1.6 |