Table 3. Nucleotide compositions of different regions in grouper mitochondrial genomes.
| Strand | Gene/Region | Position | Nucleotide composition (%) |
||||
|---|---|---|---|---|---|---|---|
| A | T | G | C | A+T | |||
| H | Protein-coding gene | 1st codon | 26.3±0.4 | 21.0±0.4 | 24.8±0.4 | 27.9±0.5 | 47.3±0.8 |
| 2nd codon | 18.3±0.1 | 40.5±0.2 | 13.2±0.1 | 28.0±0.2 | 58.8±0.3 | ||
| 3rd codon | 35.5±1.3 | 24.4±2.5 | 6.1±1.1 | 34.3±2.4 | 59.9±3.8 | ||
| tRNA gene | 30.6±0.6 | 25.6±0.4 | 21.1±0.6 | 22.7±0.6 | 56.2±1.0 | ||
| rRNA gene | 32.2±0.5 | 21.5±0.5 | 20.9±0.3 | 25.4±0.7 | 53.7±1.0 | ||
| Control region | 34.5±1.7 | 32.9±2.0 | 13.8±1.1 | 18.8±2.5 | 67.4±3.7 | ||
| L | Protein-coding gene (ND6) | 1st codon | 15.1±1.3 | 30.5±1.5 | 42.9±1.8 | 11.5±1.2 | 45.6±2.8 |
| 2nd codon | 11.8±0.7 | 42.4±1.6 | 23.3±1.1 | 22.5±1.7 | 54.2±2.2 | ||
| 3rd codon | 21.8±4.9 | 41.8±3.8 | 27.8±3.0 | 8.6±2.8 | 63.6±8.7 | ||
| tRNA gene | 25.6±0.6 | 31.9±0.6 | 25.7±0.7 | 16.9±0.4 | 57.5±1.2 | ||
Numbers in the table are means and standard deviations of 22 grouper species.