Structure and Property of the Naturally-Occurring Amino Acids
- Page ID
- 4687
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Amino Acid | 3 Letter Code | 1 Letter Code | Structure | pKa1 (α-carboxyl) | pka2 (α-amino) | pka3 (side chain) |
Nonpolar Side Chains | ||||||
Glycine | Gly | G | ![]() | 2.35 | 9.78 | . |
Alanine | Ala | A | ![]() | 2.35 | 9.87 | . |
Valine | Val | V | ![]() | 2.29 | 9.74 | . |
Leucine | Leu | L | ![]() | 2.33 | 9.74 | . |
Isoleucine | Ile | I | ![]() | 2.32 | 9.76 | . |
Methionine | Met | M | ![]() | 2.13 | 9.28 | . |
Proline | Pro | P | ![]() | 1.95 | 10.64 | . |
Phenylalanine | Phe | F | ![]() | 2.20 | 9.31 | . |
Tryptophan | Trp | W | ![]() | 2.46 | 9.41 | . |
Uncharged Polar Side Chains | ||||||
Serine | Ser | S | ![]() | 2.19 | 9.21 | . |
Threonine | Thr | T | ![]() | 2.09 | 9.10 | . |
Asparagine | Asn | N | ![]() | 2.14 | 8.72 | . |
Glutamine | Gln | Q | ![]() | 2.17 | 9.13 | . |
Tyrosine | Tyr | Y | ![]() | 2.20 | 9.21 | 10.46 |
Cysteine | Cys | C | ![]() | 1.92 | 10.70 | 8.37 |
Charged Polar Side Chains10.54 | ||||||
Lysine | Lys | K | ![]() | 2.16 | 9.06 | 10.54 |
Arginine | Arg | R | ![]() | 1.82 | 8.99 | 12.48 |
Histidine | His | H | ![]() | 1.80 | 9.33 | 6.04 |
Aspartic Acid | Asp | D | ![]() | 1.99 | 9.90 | 3.90 |
Glutamic Acid | Glu | E | ![]() | 2.10 | 9.47 | 4.07 |