Amino Acid Triplets (Codons) Alanine (Ala) GCU, GCC, GCA, GCG Arginine (Arg) CGU, CGC, CGA, CGG, AGA, AGG Asparagine (Asn) AAU, AAC Aspartic Acid (Asp) GAU, GAC Cysteine (Cys) UGU, UGC Glutamine (Gln) CAA, CAG Glutamic Acid (Glu) GAA, GAG Glycine (Gly) GGU, GGC, GGA, GGG Histidine (His) CAU, CAC Isoleucine (Ile) AUU, AUC, AUA Leucine (Leu) UUA, UUG, CUU, CUC, CUA, CUG Lysine (Lys) AAA, AAG Methionine (Met) AUG (This is also the Start codon) Phenylalanine (Phe) UUU, UUC Proline (Pro) CCU, CCC, CCA, CCG Serine (Ser) UCU, UCC, UCA, UCG, AGU, AGC Threonine (Thr) ACU, ACC, ACA, ACG Tryptophan (Trp) UGG Tyrosine (Tyr) UAU, UAC Valine (Val) GUU, GUC, GUA, GUG
