| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neophoca cinerea | 39.0 | 61.0 | 340 | 253 | 405 | 522 | 24.1 |
| Neophocaena phocaenoides | 37.7 | 62.3 | 330 | 241 | 423 | 522 | 33.0 |
| Neotragus moschatus | 37.2 | 62.8 | 322 | 240 | 421 | 528 | 13.5 |
| Neovison vison | 36.1 | 63.9 | 312 | 235 | 432 | 538 | 11.4 |
| Nyctalus noctula | 35.5 | 64.5 | 293 | 243 | 442 | 533 | 12.0 |
| Nyctereutes procyonoides | 37.4 | 62.6 | 322 | 243 | 429 | 517 | 16.6 |
| Nycticebus coucang | 37.9 | 62.1 | 329 | 242 | 408 | 528 | 25.8 |
| Ochotona princeps | 39.2 | 60.8 | 353 | 237 | 398 | 518 | 7.0 |
| Octodon degus | 34.8 | 65.2 | 298 | 226 | 439 | 542 | 14.0 |
| Odocoileus hemionus | 36.4 | 63.6 | 308 | 243 | 430 | 534 | 22.0 |
| Odocoileus virginianus | 36.4 | 63.6 | 309 | 242 | 429 | 534 | 23.0 |
| Okapia johnstoni | 37.8 | 62.2 | 334 | 238 | 405 | 536 | 33.5 |
| Orcaella brevirostris | 35.7 | 64.3 | 310 | 232 | 434 | 543 | 30.0 |
| Orcinus orca | 37.4 | 62.6 | 330 | 238 | 413 | 537 | 90.0 |
| Oreamnos americanus | 36.3 | 63.7 | 322 | 231 | 437 | 532 | 20.8 |
| Oreotragus oreotragus | 35.9 | 64.1 | 313 | 229 | 429 | 539 | 25.9 |
| Ornithorhynchus anatinus | 35.1 | 64.9 | 298 | 229 | 468 | 507 | 22.6 |
| Orycteropus afer | 36.1 | 63.9 | 319 | 227 | 426 | 539 | 29.8 |
| Oryctolagus cuniculus | 39.1 | 60.9 | 331 | 256 | 423 | 492 | 9.0 |
| Oryx dammah | 34.9 | 65.1 | 300 | 228 | 447 | 537 | 27.5 |
| Oryx gazella | 35.8 | 64.2 | 313 | 227 | 430 | 538 | 23.8 |
| Oryx leucoryx | 35.6 | 64.4 | 309 | 229 | 437 | 537 | 20.8 |
| Otolemur crassicaudatus | 41.2 | 58.8 | 667 | 351 | 642 | 809 | 22.7 |
| Ourebia ourebi | 36.4 | 63.6 | 321 | 229 | 422 | 540 | 15.9 |
| Ovibos moschatus | 36.2 | 63.8 | 321 | 227 | 428 | 536 | 27.4 |
| Ovis ammon | 35.6 | 64.4 | 311 | 226 | 438 | 535 | 16.8 |
| Ovis aries | 35.8 | 64.2 | 314 | 227 | 436 | 534 | 22.8 |
| Ovis canadensis | 35.6 | 64.4 | 311 | 227 | 440 | 532 | 20.6 |
| Ozotoceros bezoarticus | 35.3 | 64.7 | 299 | 233 | 433 | 543 | 21.9 |
| Pan paniscus | 37.6 | 62.4 | 349 | 218 | 409 | 531 | 55.0 |
| Pan troglodytes | 37.4 | 62.6 | 348 | 216 | 410 | 533 | 59.4 |
| Panthera leo | 37.0 | 63.0 | 317 | 243 | 428 | 526 | 27.0 |
| Panthera onca | 36.7 | 63.3 | 315 | 235 | 428 | 521 | 28.0 |
| Panthera pardus | 36.5 | 63.5 | 313 | 234 | 428 | 524 | 27.3 |
| Panthera tigris | 36.2 | 63.8 | 312 | 236 | 431 | 536 | 26.3 |
| Papio hamadryas | 39.7 | 60.3 | 357 | 238 | 392 | 511 | 37.5 |
| Pecari tajacu | 36.9 | 63.1 | 326 | 231 | 407 | 544 | 31.5 |
| Peponocephala electra | 36.1 | 63.9 | 317 | 232 | 427 | 543 | 47.0 |
| Perameles gunnii | 33.5 | 66.5 | 275 | 191 | 432 | 494 | 6.1 |
| Perodicticus potto | 36.4 | 63.6 | 326 | 228 | 410 | 557 | 26.8 |