IUPAC one letter codes for Amino Acids

IUPAC Amino acids codes

IUPAC Amino acids codes used in bioinformatics
Amino AcidIUPAC codeThree letter codeSystematic NameFormula
AlanineAAla2-Aminopropanoic acid
CysteineCCys2-Amino-3-mercaptopropanoic acid
Aspartic AcidDAsp2-Aminobutanedioic acid
Glutamic AcidEGlu2-Aminopentanedioic acid
PhenylalanineFPhe2-Amino-3-phenylpropanoic acid
GlycineGGlyAminoethanoic acid
HistidineHHis2-Amino-3-(1H-imidazol-4-yl)-propanoic acid
IsoleucineIIle2-Amino-3-methylpentanoic acid
LysineKLys2,6-Diaminohexanoic acid
LeucineLLeu2-Amino-4-methylpentanoic acid
MethionineMMet2-Amino-4-(methylthio)butanoic acid
AsparagineNAsn2-Amino-3-carbamoylpropanoic acid
ProlinePProPyrrolidine-2-carboxylic acid
GlutamineQGln2-Amino-4-carbamoylbutanoic acid
ArginineRArg2-Amino-5-guanidinopentanoic acid
SerineSSer2-Amino-3-hydroxypropanoic acid
ThreonineTThr2-Amino-3-hydroxybutanoic acid
ValineVVal2-Amino-3-methylbutanoic acid
TryptophanWTrp2-Amino-3-(1H-indol-3-yl)-propanoic acid
TyrosineYTyr2-Amino-3-(4-hydroxyphenyl)-propanoic acid

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