| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neophoca cinerea | 44.3 | 55.7 | 296 | 128 | 243 | 290 | 24.1 |
| Neophocaena phocaenoides | 42.3 | 57.7 | 284 | 121 | 262 | 290 | 33.0 |
| Neotragus moschatus | 40.9 | 59.1 | 277 | 114 | 258 | 307 | 13.5 |
| Neovison vison | 41.3 | 58.7 | 280 | 114 | 257 | 304 | 11.4 |
| Nyctalus noctula | 37.9 | 62.1 | 245 | 117 | 300 | 293 | 12.0 |
| Nyctereutes procyonoides | 43.3 | 56.7 | 293 | 121 | 258 | 284 | 16.6 |
| Nycticebus coucang | 40.2 | 59.8 | 269 | 116 | 263 | 309 | 25.8 |
| Ochotona princeps | 45.5 | 54.5 | 317 | 118 | 247 | 273 | 7.0 |
| Octodon degus | 38.3 | 61.7 | 267 | 100 | 287 | 304 | 14.0 |
| Odocoileus hemionus | 35.9 | 64.1 | 233 | 110 | 302 | 311 | 22.0 |
| Odocoileus virginianus | 36.3 | 63.7 | 236 | 111 | 299 | 310 | 23.0 |
| Okapia johnstoni | 44.0 | 56.0 | 299 | 122 | 243 | 292 | 33.5 |
| Orcaella brevirostris | 40.6 | 59.4 | 283 | 106 | 262 | 306 | 30.0 |
| Orcinus orca | 41.0 | 59.0 | 284 | 108 | 256 | 309 | 90.0 |
| Oreamnos americanus | 40.1 | 59.9 | 268 | 115 | 271 | 302 | 20.8 |
| Oreotragus oreotragus | 39.4 | 60.6 | 265 | 112 | 275 | 304 | 25.9 |
| Ornithorhynchus anatinus | 37.7 | 62.3 | 251 | 110 | 309 | 287 | 22.6 |
| Orycteropus afer | 38.5 | 61.5 | 256 | 111 | 297 | 290 | 29.8 |
| Oryctolagus cuniculus | 42.4 | 57.6 | 288 | 117 | 276 | 274 | 9.0 |
| Oryx dammah | 39.9 | 60.1 | 272 | 109 | 264 | 311 | 27.5 |
| Oryx gazella | 39.0 | 61.0 | 262 | 111 | 273 | 310 | 23.8 |
| Oryx leucoryx | 39.0 | 61.0 | 265 | 108 | 273 | 310 | 20.8 |
| Otolemur crassicaudatus | 44.1 | 55.9 | 313 | 109 | 244 | 291 | 22.7 |
| Ourebia ourebi | 42.3 | 57.7 | 275 | 129 | 255 | 297 | 15.9 |
| Ovibos moschatus | 41.3 | 58.7 | 274 | 121 | 268 | 293 | 27.4 |
| Ovis ammon | 39.8 | 60.2 | 275 | 105 | 269 | 306 | 16.8 |
| Ovis aries | 40.6 | 59.4 | 280 | 108 | 264 | 303 | 22.8 |
| Ovis canadensis | 40.4 | 59.6 | 279 | 107 | 264 | 306 | 20.6 |
| Ozotoceros bezoarticus | 35.3 | 64.7 | 227 | 110 | 310 | 309 | 21.9 |
| Pan paniscus | 44.8 | 55.2 | 323 | 105 | 244 | 283 | 55.0 |
| Pan troglodytes | 45.9 | 54.1 | 330 | 109 | 240 | 278 | 59.4 |
| Panthera leo | 43.4 | 56.6 | 299 | 116 | 252 | 289 | 27.0 |
| Panthera onca | 44.7 | 55.3 | 305 | 122 | 246 | 283 | 28.0 |
| Panthera pardus | 43.5 | 56.5 | 297 | 119 | 254 | 286 | 27.3 |
| Panthera tigris | 42.1 | 57.9 | 289 | 113 | 259 | 295 | 26.3 |
| Papio hamadryas | 44.2 | 55.8 | 318 | 104 | 244 | 289 | 37.5 |
| Pecari tajacu | 40.5 | 59.5 | 268 | 120 | 251 | 318 | 31.5 |
| Peponocephala electra | 41.3 | 58.7 | 286 | 109 | 259 | 303 | 47.0 |
| Perameles gunnii | 34.0 | 66.0 | 218 | 107 | 319 | 313 | 6.1 |
| Perodicticus potto | 42.8 | 57.2 | 296 | 114 | 251 | 296 | 26.8 |