Table 3 Overall nucleotide composition and A + T content per structural feature, and by codon position in protein-coding genes
|  | % | %A + T | %A + T in PCG | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Codon position | ||
| Â | T | C | A | G | Overall | tRNA | rRNA | Control region | Intergenic space | 1st | 2nd | 3nd |
Cx. usquatissimus AC | 39.2 | 12.4 | 39.4 | 9.1 | 78.6 | 78.9 | 82.1 | 90.1 | 94.5 | 78.0 | 67.2 | 86.3 |
Cx. coronator | 39.2 | 12.4 | 39.3 | 9.1 | 78.6 | 79.1 | 82.2 | 89.4 | 89.5 | 78.3 | 67.2 | 86.6 |
Cx. usquatissimus RO | 39.2 | 12.4 | 39.4 | 9.1 | 78.6 | 79.1 | 82.1 | 89.5 | 89.5 | 77.0 | 73.5 | 81.4 |
Cx. usquatus | 39.2 | 12.4 | 39.5 | 9.0 | 78.7 | 78.6 | 82.1 | 89.2 | 90.9 | 78.3 | 67.2 | 86.4 |
Cx. camposi | 39.2 | 12.3 | 39.5 | 9.0 | 78.7 | 79.1 | 82.4 | 89.6 | 89.6 | 77.1 | 73.5 | 81.5 |