| | Letter | Name | Codons |
| 1 | M | Methionine | ATG | 2 | E | Glutamic acid | GAA, GAG | 3 | Q | Glutamine | CAA, CAG | 4 | D | Aspartic acid | GAT, GAC | 5 | R | Arginine | CGT, CGC, CGA, CGG, AGA, AGG | 6 | T | Threonine | ACT, ACC, ACA, ACG | 7 | N | Asparagines | AAT, AAC | 8 | H | Histidine | CAT, CAC | 9 | V | Valine | GTT, GTC, GTA, GTG | 10 | G | Glycine | GGT, GGC, GGA, GGG | 11 | L | Leucine | TTA, TTG, CTT, CTC, CTA, CTG | 12 | S | Serine | TCT, TCC, TCA, TCG, AGT, AGC | 13 | P | Proline | CCT, CCC, CCA, CCG | 14 | F | Phenylalanine | TTT, TTC | 15 | I | Isoleucine | ATT, ATC, ATA | 16 | C | Cysteine | TGT, TGC | 17 | A | Alanine | GCT, GCC, GCA, GCG | 18 | K | Lysine | AAA, AAG | 19 | Y | Thyroxine | TAT, TAC | 20 | W | Tryptophan | TGG | | | Stop | TAA, TAG, TGA |
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