| Nucleotide | Codons Combination | Nucleotide | |||
| U | C | A | G | ||
| U | UUU - 0 a | UCU - 4 | UAU - 8 | UGU - 12 | U |
| UUC - 1 | UCC - 5 | UAC - 9 | UGC - 13 | C | |
| UUA - 2 | UCA - 6 | UAA - 10 | UGA - 14 | A | |
| UUG - 3 | UCG - 7 | UAG - 11 | UGG - 15 | G | |
| C | CUU - 16 | CCU - 20 | CAU - 24 | CGU - 28 | U |
| CUC - 17 | CCC - 21 | CAC - 25 | CGC - 29 | C | |
| CUA - 18 | CCA - 22 | CAA - 26 | CGA - 30 | A | |
| CUG - 19 | CCG - 23 | CAG - 27 | CGG - 31 | G | |
| A | AUU - 32 | ACU - 36 | AAU - 40 | AGU - 44 | U |
| AUC - 33 | ACC - 37 | AAC - 41 | AGC - 45 | C | |
| AUA - 34 | ACA - 38 | AAA - 42 | AGA - 46 | A | |
| AUG - 35 | ACG - 39 | AAG - 43 | AGG - 47 | G | |
| G | GUU - 48 | GCU - 52 | GAU - 56 | GGU - 60 | U |
| GUC - 49 | GCC - 53 | GAC - 57 | GGC - 61 | C | |
| GUA - 50 | GCA - 54 | GAA - 58 | GGA - 62 | A | |
| GUG - 51 | GCG - 55 | GAG - 59 | GGG - 63 | G | |