Amino Acids

Name 3-letter Code 1-letter Code Side-Chain Class Hydropathy Index pKa (Side-Chain) MW (Da)
Alanine Ala A Aliphatic 1.8 89.1
Arginine Arg R Basic -4.5 12.48 174.2
Asparagine Asn N Amide -3.5 132.1
Aspartic Acid Asp D Acidic -3.5 3.90 133.1
Cysteine Cys C Sulfur-containing 2.5 8.18 121.2
Glutamic Acid Glu E Acidic -3.5 4.07 147.1
Glutamine Gln Q Amide -3.5 146.1
Glycine Gly G Aliphatic -0.4 75.1
Histidine His H Basic -3.2 6.04 155.2
Isoleucine Ile I Aliphatic 4.5 131.2
Leucine Leu L Aliphatic 3.8 131.2
Lysine Lys K Basic -3.9 10.54 146.2
Methionine Met M Sulfur-containing 1.9 149.2
Phenylalanine Phe F Aromatic 2.8 165.2
Proline Pro P Cyclic -1.6 115.1
Pyrrolysine Pyl O 255.3
Selenocysteine Sec U 5.73 168.1
Serine Ser S Hydroxyl-containing -0.8 105.1
Threonine Thr T Hydroxyl-containing -0.7 119.1
Tryptophan Trp W Aromatic -0.9 204.2
Tyrosine Tyr Y Aromatic, Hydroxyl-containing -1.3 10.46 181.2
Valine Val V Aliphatic 4.2 117.1