From: Short-wavelength sensitive opsin (SWS1) as a new marker for vertebrate phylogenetics
 |  | A | C | G | T | Avg # bps | χ2 | df | p |
---|---|---|---|---|---|---|---|---|---|
All sites | Fish | 0.214 | 0.290 | 0.249 | 0.247 | 1008 | 40.53 | 48 | 0.770 |
 | Reptiles | 0.165 | 0.344 | 0.263 | 0.228 | 932.7 | 18.77 | 45 | 1.000 |
 | Mammals | 0.191 | 0.293 | 0.246 | 0.271 | 1029 | 36.98 | 69 | 0.999 |
 | Tetrapods | 0.197 | 0.315 | 0.242 | 0.246 | 995.4 | 419.3 | 129 | <<0.001 |
 | Vertebrates | 0.210 | 0.306 | 0.239 | 0.245 | 999.6 | 613.4 | 183 | <<0.001 |
Codon #1 | Fish | 0.266 | 0.160 | 0.289 | 0.286 | 336.0 | 7.590 | 48 | 1.000 |
 | Reptiles | 0.235 | 0.198 | 0.295 | 0.271 | 310.9 | 8.498 | 45 | 1.000 |
 | Mammals | 0.242 | 0.205 | 0.282 | 0.272 | 342.9 | 12.94 | 69 | 1.000 |
 | Tetrapods | 0.260 | 0.198 | 0.279 | 0.263 | 331.8 | 37.29 | 129 | 1.000 |
 | Vertebrates | 0.281 | 0.171 | 0.279 | 0.269 | 333.2 | 97.57 | 183 | 1.000 |
Codon #2 | Fish | 0.230 | 0.262 | 0.163 | 0.345 | 336.0 | 3.147 | 48 | 1.000 |
 | Reptiles | 0.220 | 0.244 | 0.184 | 0.352 | 310.9 | 10.32 | 45 | 1.000 |
 | Mammals | 0.221 | 0.235 | 0.184 | 0.359 | 342.9 | 5.601 | 69 | 1.000 |
 | Tetrapods | 0.222 | 0.244 | 0.179 | 0.356 | 331.8 | 18.94 | 129 | 1.000 |
 | Vertebrates | 0.224 | 0.250 | 0.176 | 0.349 | 333.2 | 76.50 | 183 | 1.000 |
Codon #3 | Fish | 0.143 | 0.392 | 0.280 | 0.186 | 336.6 | 84.81 | 48 | 0.001 |
 | Reptiles | 0.050 | 0.588 | 0.311 | 0.051 | 310.8 | 92.56 | 45 | <<0.001 |
 | Mammals | 0.118 | 0.416 | 0.266 | 0.200 | 342.9 | 66.27 | 69 | 0.571 |
 | Tetrapods | 0.129 | 0.454 | 0.253 | 0.164 | 331.7 | 1363.3 | 129 | <<0.001 |
 | Vertebrates | 0.143 | 0.432 | 0.245 | 0.179 | 333.1 | 1678.6 | 183 | <<0.001 |