Ion Chemistry Laboratory
Centre for Research in Mass Spectrometry
 York University

 

Amino Acid Codes and Structures

Amino Acid 3 Letter Code 1 Letter Code HOOC(NH2)CH-R Note
Alanine Ala A -CH3 -
Arginine Arg R -CH2CH2CH2NHC(=NH)NH2 Basic
Asparagine Asn N -CH2CONH2 -
Aspartic Acid Asp D -CH2COOH Acidic
Cysteine Cys C -CH2SH -
Glutamine Gln Q -CH2CH2CONH2 -
Glutamic Acid Glu E -CH2CH2COOH Acidic
Glycine Gly G -H -
Histidine His H -CH2-Imidazole Basic
Isoleucine Ile I -CH(CH3)CH2CH3 -
Leucine Leu L -CH2CH(CH3)2 -
Lysine Lys K -CH2CH2CH2CH2NH2 Basic
Methionine Met M -CH2CH2SCH3 -
Phenylalanine Phe F -CH2Ph Aromatic
Proline Pro P -NHCH2CH2CH2- -
Serine Ser S -CH2OH -
Threonine Thr T -CH(OH)CH3 -
Tryptophan Trp W -CH2-Indole Aromatic
Tyrosine Tyr Y -CH2(C6H4)OH Aromatic
Valine Val V -CH(CH3)2 -
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Ion Chemistry Laboratory, York University 4700 Keele Street, Toronto, Ontario M3J 1P3