Table 5. Codon usage in the protein CNTF in chicken and humansA.
| CNTF | |||||||
| Chicken | Human | ||||||
| AA | Syn. | N | PC | Prop. | N | PC | Prop. |
| Phe | 2 | 2 | TTC | 0.667 | 4 | TTC | 0.571 |
| Leu | 6 | 25 | CTG | 0.807 | 8 | CTG | 0.307 |
| Ile | 3 | 3 | ATC | 1.000 | 5 | ATC | 0.417 |
| Trp | 1 | 2 | TGG | 1.000 | 4 | TGG | 1.000 |
| Val | 4 | 7 | GTG | 0.636 | 4 | GTG | 0.500 |
| Ser | 6 | 6 | AGC | 0.462 | 4 | TCT | 0.308 |
| Pro | 4 | 4 | CCC | 0.400 | 3 | CCA | 0.429 |
| Thr | 4 | 4 | ACC | 0.500 | 6 | ACC | 0.500 |
| Ala | 4 | 12 | GCC | 0.462 | 7 | GCT | 0.467 |
| Tyr | 2 | 3 | TAC | 1.000 | 3 | TAT | 0.600 |
| Cys | 2 | 1 | TGC | 1.000 | 1 | TGT | 1.000 |
| His | 2 | 4 | CAC | 1.000 | 9 | CAT | 0.900 |
| Gln | 2 | 10 | CAG | 1.000 | 8 | CAG | 0.667 |
| Asn | 2 | 1 | AAC | 1.000 | 6 | AAC | 0.750 |
| Lys | 2 | 3 | AAG | 1.000 | 8 | AAG | 0.889 |
| Arg | 6 | 9 | CGG | 0.474 | 5 | CGT | 0.417 |
| Asp | 2 | 9 | GAC | 0.819 | 6 | GAC | 0.600 |
| Glu | 2 | 17 | GAG | 1.000 | 10 | GAG | 0.714 |
| Gly | 4 | 9 | GGC | 0.692 | 4 | GGG | 0.400 |
| Met | 1 | 4 | ATG | 1.000 | 5 | ATG | 1.000 |
A
For each amino acid (AA) the number of synonymous (Syn.) codons is given. For each protein sequence, three values are given: the number (N) of occurrences of each AA, the preferred codon (PC) and the proportion (Prop.) in which the PC is used.