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Standard Amino Acids
Chemical Properties, Physical Properties and General Information


Amino Acid Code Formula Molar
Mass
Polarity Acidity Hydropathy
Index
Isoelectric
Point (pI)
pKaC pKaN van der
Waals volume
Codons Essential
Alanine Ala / A C3H7NO2 89.09 nonpolar neutral 1.8 6.01 2.35 9.87 67 GCU, GCC, GCA, GCG  
Arginine Arg / R C6H14N4O2 174.20 polar basic (strong) -4.5 10.76 1.82 8.99 148 CGU, CGC, CGA, CGG, AGA, AGG X
Asparagine Asn / N C4H8N2O3 132.11 polar neutral -3.5 5.41 2.14 8.72 96 AAU, AAC  
Aspartic Acid Asp / D C4H7NO4 133.10 polar acidic -3.5 2.85 1.99 9.90 91 GAU, GAC  
Cysteine Cys / C C3H7NO2S 121.15 polar neutral 2.5 5.05 1.92 10.70 86 UGU, UGC  
Glutamic Acid Glu / E C5H9NO4 147.13 polar acidic -3.5 3.15 2.10 9.47 109 GAA, GAG  
Glutamine Gln / Q C5H10N2O3 146.15 polar neutral -3.5 5.65 2.17 9.13 114 CAA, CAG  
Glycine Gly / G C2H5NO2 75.06 nonpolar neutral -0.4 6.06 2.35 9.78 48 GGU, GGC, GGA, GGG  
Histidine His / H C6H9N3O2 155.15 polar basic (weak) -3.2 7.60 1.80 9.33 118 CAU, CAC X
Isoleucine Ile / I C6H13NO2 131.17 nonpolar neutral 4.5 6.05 2.32 9.76 124 AUU, AUC, AUA X
Leucine Leu / L C6H13NO2 131.17 nonpolar neutral 3.8 6.01 2.33 9.74 124 UUA, UUG, CUU, CUC, CUA, CUG X
Lysine Lys / K C6H14N2O2 146.18 polar basic -3.9 9.60 2.16 9.06 135 AAA, AAG X
Methionine Met / M C5H11NO2S 149.20 nonpolar neutral 1.9 5.74 2.13 9.28 124 AUG X
Phenylalanine Phe / F C9H11NO2 165.19 nonpolar neutral 2.8 5.49 2.20 9.31 135 UUU, UUC X
Proline Pro / P C5H9NO2 115.13 nonpolar neutral -1.6 6.30 1.95 10.64 90 CCU, CCC, CCA, CCG  
Serine Ser / S C3H7NO3 105.09 polar neutral -0.8 5.68 2.19 9.21 73 UCU, UCC, UCA, UCG, AGU, AGC  
Threonine Thr / T C4H9NO3 119.12 polar neutral -0.7 5.60 2.09 9.10 93 ACU, ACC, ACA, ACG X
Tryptophan Trp / W C11H12N2O2 204.22 nonpolar neutral -0.9 5.89 2.46 9.41 163 UGG X
Tyrosine Tyr / Y C9H11NO3 181.19 polar neutral -1.3 5.64 2.20 9.21 141 UAU, UAC  
Valine Val / V C5H11NO2 117.14 nonpolar neutral 4.2 6.00 2.39 9.74 105 GUU, GUC, GUA, GUG X


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Last updated: April 2011
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