| Species (N=387) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neovison vison | 40.2 | 59.8 | 218 | 168 | 213 | 361 | 11.4 |
| Nyctalus noctula | 40.3 | 59.7 | 208 | 179 | 236 | 337 | 12.0 |
| Nyctereutes procyonoides | 40.9 | 59.1 | 221 | 169 | 213 | 351 | 16.6 |
| Nycticebus coucang | 43.2 | 56.8 | 242 | 177 | 212 | 340 | 25.8 |
| Ochotona princeps | 42.3 | 57.7 | 232 | 175 | 223 | 332 | 7.0 |
| Octodon degus | 38.5 | 61.5 | 206 | 161 | 233 | 353 | 14.0 |
| Odocoileus hemionus | 40.1 | 59.9 | 213 | 170 | 224 | 347 | 22.0 |
| Odocoileus virginianus | 40.1 | 59.9 | 213 | 170 | 224 | 347 | 23.0 |
| Okapia johnstoni | 40.3 | 59.7 | 219 | 166 | 216 | 354 | 33.5 |
| Orcaella brevirostris | 41.8 | 58.2 | 223 | 183 | 222 | 344 | 30.0 |
| Orcinus orca | 42.1 | 57.9 | 227 | 183 | 217 | 347 | 90.0 |
| Oreamnos americanus | 42.2 | 57.8 | 231 | 172 | 205 | 347 | 20.8 |
| Oreotragus oreotragus | 41.6 | 58.4 | 224 | 173 | 212 | 346 | 25.9 |
| Ornithorhynchus anatinus | 40.0 | 60.0 | 209 | 168 | 222 | 344 | 22.6 |
| Orycteropus afer | 38.1 | 61.9 | 201 | 163 | 243 | 349 | 29.8 |
| Oryctolagus cuniculus | 40.2 | 59.8 | 211 | 174 | 229 | 343 | 9.0 |
| Oryx dammah | 41.8 | 58.2 | 224 | 175 | 214 | 341 | 27.5 |
| Oryx gazella | 41.0 | 59.0 | 222 | 170 | 215 | 348 | 23.8 |
| Oryx leucoryx | 41.3 | 58.7 | 222 | 172 | 215 | 345 | 20.8 |
| Otolemur crassicaudatus | 42.0 | 58.0 | 238 | 171 | 212 | 352 | 22.7 |
| Ourebia ourebi | 40.2 | 59.8 | 220 | 164 | 214 | 357 | 15.9 |
| Ovibos moschatus | 42.7 | 57.3 | 233 | 176 | 207 | 341 | 27.4 |
| Ovis ammon | 41.6 | 58.4 | 225 | 174 | 210 | 350 | 16.8 |
| Ovis aries | 40.8 | 59.2 | 221 | 170 | 214 | 353 | 22.8 |
| Ovis canadensis | 40.3 | 59.7 | 217 | 169 | 217 | 354 | 20.6 |
| Ozotoceros bezoarticus | 39.2 | 60.8 | 203 | 171 | 239 | 342 | 21.9 |
| Pan paniscus | 44.8 | 55.2 | 246 | 180 | 209 | 315 | 55.0 |
| Pan troglodytes | 44.6 | 55.4 | 244 | 179 | 211 | 315 | 59.4 |
| Panthera leo | 41.8 | 58.2 | 231 | 172 | 216 | 345 | 27.0 |
| Panthera onca | 41.7 | 58.3 | 222 | 178 | 220 | 340 | 28.0 |
| Panthera pardus | 41.7 | 58.3 | 224 | 176 | 218 | 341 | 27.3 |
| Panthera tigris | 41.9 | 58.1 | 228 | 174 | 214 | 344 | 26.3 |
| Papio hamadryas | 44.9 | 55.1 | 247 | 178 | 211 | 311 | 37.5 |
| Pecari tajacu | 40.8 | 59.2 | 223 | 165 | 206 | 357 | 31.5 |
| Peponocephala electra | 41.5 | 58.5 | 225 | 179 | 219 | 351 | 47.0 |
| Perameles gunnii | 37.8 | 62.2 | 198 | 161 | 244 | 346 | 6.1 |
| Perodicticus potto | 44.1 | 55.9 | 259 | 168 | 193 | 348 | 26.8 |
| Petaurista alborufus | 42.4 | 57.6 | 242 | 170 | 236 | 323 | 21.4 |
| Petaurus breviceps | 38.9 | 61.1 | 204 | 167 | 230 | 353 | 17.8 |
| Phacochoerus africanus | 40.1 | 59.9 | 219 | 167 | 224 | 353 | 20.9 |