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Amino Acids

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For a general introduction to amino acids, please see Amino Acids in Wikipedia.

Angel Herráez has provided a tutorial introduction to amino acid structure in which each of the 20 amino acids may be visualized in 3D using Jmol.

Here are the names of the twenty standard amino acids, with their three and one-letter abbreviations. Mnemonic names may help you to remember the one-letter codes, but are not the correct names.

Ala A Alanine
Arg R Arginine
Asn N Asparagine
Asp D Aspartic acid
 (mnemonic: asparDic)
Cys C Cysteine

Gln Q Glutamine
 (mnemonic: Quetamine)
Glu E Glutamic acid
 (mnemonic: gluEtamic)
Gly G Glycine
His H Histidine
Ile I Isoleucine

Leu L Leucine
Lys K Lysine
 (mnemonic: liKesine)
Met M Methionine
Phe F Phenylalanine
 (mnemonic: Fenylalanine)
Pro P Proline

Ser S Serine
Thr T Threonine
Trp W Tryptophan
 (mnemonic: tWyptophan)
Tyr Y Tyrosine
Val V Valine

See also Standard Residues and Non-Standard Residues.

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