Amino Acids

Clicking on the name of the amino acid will download a PDB structure file that can be displayed using a PDB file viewer. If you don't already have a PDB file viewer, try:

Name Symbol Mass (-H2O) Side Chain Occurence (%)
Alanine A, Ala 71.079
CH3-
7.49
Arginine R, Arg 156.188
HN=C(NH2)-NH-(CH2)3-
5.22
Asparagine N, Asn 114.104
H2N-CO-CH2-
4.53
Aspartic acid D, Asp 115.089 HOOC-CH2- 5.22
Cysteine C, Cys 103.145 HS-CH2- 1.82
Glutamine Q, Gln 128.131 H2N-CO-(CH2)2- 4.11
Glutamic acid E, Glu 129.116 HOOC-(CH2)2- 6.26
Glycine G, Gly 57.052 H- 7.10
Histidine H, His 137.141
N=CH-NH-CH=C-CH2-
|__________|
2.23
Isoleucine I, Ile 113.160
CH3-CH2-CH(CH3)-
5.45
Leucine L, Leu 113.160
(CH3)2-CH-CH2-
9.06
Lysine K, Lys 128.17
H2N-(CH2)4-
5.82
Methionine M, Met 131.199
CH3-S-(CH2)2-
2.27
Phenylalanine F, Phe 147.177
Phenyl-CH2-
3.91
Proline P, Pro 97.117
-N-(CH2)3-CH-
 |_________|
5.12
Serine S, Ser 87.078
HO-CH2-
7.34
Threonine T, Thr 101.105
CH3-CH(OH)-
5.96
Tryptophan W, Trp 186.213
Phenyl-NH-CH=C-CH2-
|___________|
1.32
Tyrosine Y, Tyr 163.176
4-OH-Phenyl-CH2-
3.25
Valine V, Val 99.133
CH3-CH(CH2)-
6.48

The amino acid occurence statistics were compiled using the NCBI database.


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