| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neophoca cinerea | 40.4 | 59.6 | 82 | 38 | 90 | 87 | 24.1 |
| Neophocaena phocaenoides | 41.1 | 58.9 | 84 | 38 | 91 | 84 | 33.0 |
| Neotragus moschatus | 37.0 | 63.0 | 71 | 39 | 95 | 92 | 13.5 |
| Neovison vison | 36.4 | 63.6 | 77 | 31 | 100 | 89 | 11.4 |
| Nyctalus noctula | 34.3 | 65.7 | 66 | 36 | 108 | 87 | 12.0 |
| Nyctereutes procyonoides | 39.4 | 60.6 | 78 | 39 | 90 | 90 | 16.6 |
| Nycticebus coucang | 43.4 | 56.6 | 86 | 43 | 89 | 79 | 25.8 |
| Ochotona princeps | 39.7 | 60.3 | 83 | 35 | 95 | 84 | 7.0 |
| Octodon degus | 34.7 | 65.3 | 68 | 35 | 106 | 88 | 14.0 |
| Odocoileus hemionus | 35.4 | 64.6 | 69 | 36 | 96 | 96 | 22.0 |
| Odocoileus virginianus | 35.7 | 63.6 | 70 | 36 | 94 | 95 | 23.0 |
| Okapia johnstoni | 38.4 | 61.6 | 76 | 38 | 90 | 93 | 33.5 |
| Orcaella brevirostris | 37.7 | 62.3 | 79 | 33 | 95 | 90 | 30.0 |
| Orcinus orca | 40.7 | 59.3 | 87 | 34 | 86 | 90 | 90.0 |
| Oreamnos americanus | 37.0 | 63.0 | 75 | 35 | 94 | 93 | 20.8 |
| Oreotragus oreotragus | 36.7 | 63.3 | 72 | 37 | 96 | 92 | 25.9 |
| Ornithorhynchus anatinus | 34.7 | 65.3 | 68 | 35 | 105 | 89 | 22.6 |
| Orycteropus afer | 37.4 | 62.6 | 77 | 34 | 94 | 92 | 29.8 |
| Oryctolagus cuniculus | 36.0 | 64.0 | 76 | 31 | 102 | 88 | 9.0 |
| Oryx dammah | 40.1 | 59.9 | 81 | 38 | 81 | 97 | 27.5 |
| Oryx gazella | 38.0 | 62.0 | 79 | 34 | 90 | 94 | 23.8 |
| Oryx leucoryx | 37.7 | 62.3 | 76 | 36 | 92 | 93 | 20.8 |
| Otolemur crassicaudatus | 42.1 | 57.9 | 92 | 33 | 84 | 88 | 22.7 |
| Ourebia ourebi | 35.4 | 64.6 | 71 | 34 | 96 | 96 | 15.9 |
| Ovibos moschatus | 37.7 | 62.3 | 73 | 39 | 95 | 90 | 27.4 |
| Ovis ammon | 38.4 | 61.6 | 78 | 36 | 92 | 91 | 16.8 |
| Ovis aries | 39.7 | 60.3 | 81 | 37 | 89 | 90 | 22.8 |
| Ovis canadensis | 38.4 | 61.6 | 78 | 36 | 92 | 91 | 20.6 |
| Ozotoceros bezoarticus | 31.6 | 68.4 | 59 | 35 | 105 | 98 | 21.9 |
| Pan paniscus | 38.4 | 61.6 | 83 | 31 | 92 | 91 | 55.0 |
| Pan troglodytes | 39.1 | 60.9 | 85 | 31 | 90 | 91 | 59.4 |
| Panthera leo | 38.7 | 61.3 | 74 | 41 | 93 | 89 | 27.0 |
| Panthera onca | 41.1 | 58.9 | 80 | 42 | 91 | 84 | 28.0 |
| Panthera pardus | 37.7 | 62.3 | 75 | 37 | 93 | 92 | 27.3 |
| Panthera tigris | 40.4 | 59.6 | 77 | 43 | 92 | 85 | 26.3 |
| Papio hamadryas | 44.1 | 55.9 | 91 | 40 | 82 | 84 | 37.5 |
| Pecari tajacu | 38.7 | 61.3 | 79 | 36 | 85 | 97 | 31.5 |
| Peponocephala electra | 41.1 | 58.9 | 87 | 35 | 86 | 89 | 47.0 |
| Perameles gunnii | 34.7 | 65.3 | 72 | 31 | 102 | 92 | 6.1 |
| Perodicticus potto | 41.4 | 58.6 | 84 | 39 | 86 | 88 | 26.8 |