Substituted amino acids Substituted amino acids are a class of compounds derived from the amino acid base structure. List of substituted amino acids CompoundStructure Substituted carboxylic acidsSubstituted amino acids Alanine (Ala) Serine (Ser) Proline (Pro) Valine (Val) Threonine (Thr) Cysteine (Cys) Isoleucine (Ile) Leucine (Leu) Asparagine (Asn) Aspartic acid (Asp) Glutamine (Gln) Lysine (Lys) Glutamic acid (Glu) Methionine (Met) Histidine (His) Acetylcysteine (NAC) Phenylalanine (Phe) Selenocysteine (Sec) Arginine Theanine Citrulline Tyrosine (Tyr) 3,4-Dihydroxyphenylalanine (DOPA, L-DOPA) L-3,4-Dihydroxyphenylalanine (L-DOPA) Fenclonine (PCPA) Melevodopa Methyldopa N-Acetyl-L-tyrosine (NALT) Etilevodopa Carbidopa Caramboxin Foslevodopa Saxitoxin Bestatin (Ubenimex) Ubenimex Domoic acid Neosaxitoxin Benzylpenicillin Phenoxymethylpenicillin Amoxicillin Remifentanil Carfentanyl Amastatin Leu-enkephalin Ergocornine Met-enkephalin Thyroxine (T4) α-Endorphin γ-Endorphin β-Endorphin See also Substituted carboxylic acids
