-------------------------------------------------------------------------------------------------------------------------- Amino Acid 3-Letter 1-Letter MW pK1(-COOH) pK2(-NH2) pKR pKI -------------------------------------------------------------------------------------------------------------------------- Alanine Ala A 89.09 2.34 9.69 6.00 CH3-CH(NH2)-COOH C3H7NO2 Arginine Arg R 174.20 2.17 9.04 12.48 11.15 HN=C(NH2)-NH-(CH2)3-CH(NH2)-COOH C6H14N4O2 Asparagine Asn N 132.12 5.41 H2N-CO-CH2-CH(NH2)-COOH C4H8N2O3 Aspartic acid Asp D 133.10 2.09 9.82 3.86 2.77 HOOC-CH2-CH(NH2)-COOH C4H7NO4 Cysteine Cys C 121.15 1.71 10.78 8.33 5.02 HS-CH2-CH(NH2)-COOH C3H7NO2S Glutamic acid Glu E 147.13 2.19 9.67 4.25 3.22 HOOC-(CH2)2-CH(NH2)-COOH C5H9NO4 Glutamine Gln Q 146.15 2.17 9.13 5.65 H2N-CO-(CH2)2-CH(NH2)-COOH C5H10N2O3 Glycine Gly G 75.07 2.34 9.6 5.97 H-CH(NH2)-COOH C2H5NO2 Histidine His H 155.16 1.82 9.17 6.0 7.47 NH-CH=N-CH=C-CH2-CH(NH2)-COOH C6H9N3O2 |__________| Isoleucine Ile I 131.18 5.94 CH3-CH2-CH(CH3)-CH(NH2)-COOH C6H13NO2 Leucine Leu L 131.18 2.36 9.60 5.98 (CH3)2-CH-CH2-CH(NH2)-COOH C3H13NO2 Lysine Lys K 146.19 2.18 8.95 10.53 9.59 H2N-(CH2)4-CH(NH2)-COOH C6H14N2O2 Methionine Met M 149.21 5.74 CH3-S-(CH2)2-CH(NH2)-COOH C5H11NO2S Phenylalanine Phe F 165.19 5.48 Ph-CH2-CH(NH2)-COOH C9H11NO2 Proline Pro P 115.13 6.30 -(CH2)3-CH(NH )-COOH C5H9NO2 |__________| Serine Ser S 105.10 2.21 9.15 5.68 HO-CH2-CH(NH2)-COOH C3H7NO3 Threonine Thr T 119.12 2.63 10.43 5.64 CH3-CH(OH)-CH(NH2)-COOH C4H9NO3 Tryptophan Trp W 204.23 5.89 Ph-NH-CH=C-CH2-CH(NH2)-COOH C11H12N2O2 |_______| Tyrosine Tyr Y 181.19 2.20 9.11 10.07 5.66 HO-p-Ph-CH2-CH(NH2)-COOH C9H11NO3 Valine Val V 117.15 5.96 (CH3)2-CH-CH(NH2)-COOH C5H11NO2 --------------------------------------------------------------------------------
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