| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neophoca cinerea | 43.9 | 56.1 | 341 | 160 | 296 | 343 | 24.1 |
| Neophocaena phocaenoides | 42.8 | 57.2 | 332 | 156 | 313 | 339 | 33.0 |
| Neotragus moschatus | 41.8 | 58.2 | 323 | 153 | 309 | 355 | 13.5 |
| Neovison vison | 39.8 | 60.2 | 306 | 148 | 346 | 340 | 11.4 |
| Nyctalus noctula | 42.1 | 57.9 | 310 | 170 | 354 | 306 | 12.0 |
| Nyctereutes procyonoides | 42.5 | 57.5 | 328 | 157 | 318 | 337 | 16.6 |
| Nycticebus coucang | 43.1 | 56.9 | 337 | 154 | 317 | 332 | 25.8 |
| Ochotona princeps | 47.1 | 52.9 | 388 | 148 | 276 | 326 | 7.0 |
| Octodon degus | 39.8 | 60.2 | 314 | 140 | 327 | 359 | 14.0 |
| Odocoileus hemionus | 40.1 | 59.9 | 310 | 147 | 324 | 359 | 22.0 |
| Odocoileus virginianus | 40.0 | 59.1 | 309 | 147 | 318 | 356 | 23.0 |
| Okapia johnstoni | 45.3 | 54.7 | 367 | 149 | 268 | 356 | 33.5 |
| Orcaella brevirostris | 41.8 | 58.2 | 338 | 139 | 313 | 350 | 30.0 |
| Orcinus orca | 42.9 | 57.1 | 345 | 144 | 304 | 347 | 90.0 |
| Oreamnos americanus | 41.3 | 58.7 | 323 | 148 | 304 | 365 | 20.8 |
| Oreotragus oreotragus | 40.9 | 59.1 | 314 | 152 | 315 | 359 | 25.9 |
| Ornithorhynchus anatinus | 41.4 | 58.6 | 315 | 157 | 359 | 309 | 22.6 |
| Orycteropus afer | 40.4 | 59.6 | 319 | 142 | 333 | 346 | 29.8 |
| Oryctolagus cuniculus | 43.0 | 57.0 | 346 | 144 | 330 | 319 | 9.0 |
| Oryx dammah | 43.1 | 56.9 | 339 | 152 | 296 | 353 | 27.5 |
| Oryx gazella | 42.6 | 57.4 | 332 | 154 | 302 | 352 | 23.8 |
| Oryx leucoryx | 42.5 | 57.5 | 332 | 152 | 304 | 352 | 20.8 |
| Otolemur crassicaudatus | 45.2 | 54.8 | 368 | 147 | 304 | 321 | 22.7 |
| Ourebia ourebi | 44.5 | 55.5 | 343 | 164 | 288 | 345 | 15.9 |
| Ovibos moschatus | 42.5 | 57.5 | 337 | 147 | 291 | 365 | 27.4 |
| Ovis ammon | 41.6 | 58.4 | 332 | 142 | 302 | 364 | 16.8 |
| Ovis aries | 41.5 | 58.5 | 325 | 148 | 309 | 358 | 22.8 |
| Ovis canadensis | 41.5 | 58.5 | 328 | 145 | 305 | 362 | 20.6 |
| Ozotoceros bezoarticus | 36.5 | 63.5 | 277 | 139 | 357 | 367 | 21.9 |
| Pan paniscus | 46.3 | 53.7 | 393 | 135 | 287 | 326 | 55.0 |
| Pan troglodytes | 46.0 | 54.0 | 391 | 134 | 286 | 330 | 59.4 |
| Panthera leo | 43.6 | 56.4 | 337 | 160 | 324 | 319 | 27.0 |
| Panthera onca | 44.4 | 55.6 | 346 | 160 | 314 | 320 | 28.0 |
| Panthera pardus | 44.8 | 55.2 | 342 | 169 | 317 | 312 | 27.3 |
| Panthera tigris | 44.7 | 55.3 | 346 | 164 | 312 | 318 | 26.3 |
| Papio hamadryas | 45.8 | 54.2 | 384 | 139 | 282 | 336 | 37.5 |
| Pecari tajacu | 43.2 | 56.8 | 349 | 144 | 287 | 360 | 31.5 |
| Peponocephala electra | 41.7 | 58.3 | 335 | 140 | 312 | 353 | 47.0 |
| Perameles gunnii | 38.6 | 61.4 | 302 | 140 | 343 | 361 | 6.1 |
| Perodicticus potto | 43.6 | 56.4 | 357 | 140 | 288 | 355 | 26.8 |