Amino acid nomenclature (IUPAC)
| Trivial namea | Symbolsb | Systematic namec | Formula | |
|---|---|---|---|---|
| Alanine | Ala | A | 2-Aminopropanoic acid | CH3-CH(NH2)-COOH |
| Arginine | Arg | R | 2-Amino-5-guanidinopentanoic acid |
H2N-C(=NH)-NH-[CH2]3-CH(NH2)-COOH |
| Asparagine | Asnd | N d | 2-Amino-3-carbamoylpropanoic acid | H2N-CO-CH2-CH(NH2)-COOH |
| Aspartic acid | Aspd | D d | 2-Aminobutanedioic acid | HOOC-CH2-CH(NH2)-COOH |
| Cysteine | Cys | C | 2-Amino-3-mercaptopropanoic acid |
HS-CH2-CH(NH2)-COOH |
| Glutamine | Glnd | Qd | 2-Amino-4-carbamoylbutanoic acid |
H2N-CO-[CH2]2-CH(NH2)-COOH |
| Glutamic acid | Glud | E d | 2-Aminopentanedioic acid | HOOC-[CH2]2-CH(NH2)-COOH |
| Glycine | Gly | G | Aminoethanoic acid | CH2(NH2)-COOH |
| Histidine | His | H | 2-Amino-3-(1H-imidazol-4-yl)- propanoic acid |  |
| Isoleucine | Ile | I | 2-Amino-3-methylpentanoic acide |
C2H5-CH(CH3)-CH(NH2)-COOH |
| Leucine | Leu | L | 2-Amino-4-methylpentanoic acid |
(CH3)2CH-CH2-CH(NH2)-COOH |
| Lysine | Lys | K | 2,6-Diaminohexanoic acid | H2N-[CH2]4-CH(NH2)-COOH |
| Methionine | Met | M | 2-Amino-4-(methylthio)butanoic acid |
CH3-S-[CH2]2-CH(NH2)-COOH |
| Phenylalanine | Phe | F | 2-Amino-3-phenylpropanoic acid |
C6H5-CH2-CH(NH2)-COOH |
| Proline | Pro | P | Pyrrolidine-2-carboxylic acid |  |
| Serine | Ser | S | 2-Amino-3-hydroxypropanoic acid |
HO-CH2-CH(NH2)-COOH |
| Threonine | Thr | T | 2-Amino-3-hydroxybutanoic acid e | CH3-CH(OH)-CH(NH2)-COOH |
| Tryptophan | Trp | W | 2-Amino-3-(lH-indol-3-yl)- propanoic acid |  |
| Tyrosine | Tyr | Y | 2-Amino-3-(4-hydroxyphenyl)- propanoic acid |  |
| Valine | Val | V | 2-Amino-3-methylbutanoic acid |
(CH3)2CH-CH(NH2)-COOH |
| Unspecified amino acid | Xaa | Xf | ||
Complete IUPAC nomenclature for amino acids
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