Amino Acids

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

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