| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neophoca cinerea | 42.5 | 57.5 | 107 | 41 | 90 | 110 | 24.1 |
| Neophocaena phocaenoides | 40.6 | 59.4 | 100 | 41 | 100 | 106 | 33.0 |
| Neotragus moschatus | 42.8 | 57.2 | 104 | 44 | 93 | 105 | 13.5 |
| Neovison vison | 37.5 | 62.5 | 86 | 44 | 103 | 114 | 11.4 |
| Nyctalus noctula | 39.4 | 60.6 | 86 | 51 | 116 | 95 | 12.0 |
| Nyctereutes procyonoides | 42.7 | 57.3 | 98 | 50 | 94 | 105 | 16.6 |
| Nycticebus coucang | 38.3 | 61.7 | 92 | 41 | 103 | 111 | 25.8 |
| Ochotona princeps | 41.9 | 58.1 | 102 | 43 | 102 | 99 | 7.0 |
| Octodon degus | 35.5 | 61.6 | 93 | 30 | 108 | 105 | 14.0 |
| Odocoileus hemionus | 38.2 | 61.8 | 90 | 42 | 109 | 105 | 22.0 |
| Odocoileus virginianus | 36.9 | 62.8 | 87 | 41 | 111 | 107 | 23.0 |
| Okapia johnstoni | 45.7 | 54.3 | 110 | 48 | 84 | 104 | 33.5 |
| Orcaella brevirostris | 34.4 | 65.6 | 84 | 35 | 116 | 111 | 30.0 |
| Orcinus orca | 40.2 | 59.8 | 103 | 36 | 98 | 109 | 90.0 |
| Oreamnos americanus | 39.6 | 60.4 | 101 | 36 | 98 | 111 | 20.8 |
| Oreotragus oreotragus | 39.6 | 60.4 | 93 | 44 | 99 | 110 | 25.9 |
| Ornithorhynchus anatinus | 35.3 | 64.7 | 76 | 47 | 123 | 102 | 22.6 |
| Orycteropus afer | 34.7 | 65.3 | 84 | 36 | 114 | 112 | 29.8 |
| Oryctolagus cuniculus | 36.0 | 64.0 | 85 | 40 | 114 | 108 | 9.0 |
| Oryx dammah | 41.9 | 58.1 | 102 | 43 | 93 | 108 | 27.5 |
| Oryx gazella | 40.5 | 59.5 | 101 | 39 | 96 | 110 | 23.8 |
| Oryx leucoryx | 40.5 | 59.5 | 103 | 37 | 94 | 112 | 20.8 |
| Otolemur crassicaudatus | 42.2 | 57.8 | 107 | 39 | 96 | 104 | 22.7 |
| Ourebia ourebi | 39.9 | 60.1 | 99 | 39 | 99 | 109 | 15.9 |
| Ovibos moschatus | 41.9 | 58.1 | 104 | 41 | 97 | 104 | 27.4 |
| Ovis ammon | 41.3 | 58.7 | 100 | 43 | 99 | 104 | 16.8 |
| Ovis aries | 42.2 | 57.8 | 105 | 41 | 94 | 106 | 22.8 |
| Ovis canadensis | 42.5 | 57.5 | 105 | 42 | 94 | 105 | 20.6 |
| Ozotoceros bezoarticus | 35.3 | 64.7 | 82 | 40 | 115 | 109 | 21.9 |
| Pan paniscus | 40.5 | 59.5 | 105 | 35 | 101 | 105 | 55.0 |
| Pan troglodytes | 42.2 | 57.8 | 110 | 36 | 98 | 102 | 59.4 |
| Panthera leo | 40.3 | 59.7 | 99 | 41 | 98 | 109 | 27.0 |
| Panthera onca | 40.6 | 59.4 | 97 | 44 | 100 | 106 | 28.0 |
| Panthera pardus | 40.9 | 59.1 | 98 | 44 | 100 | 105 | 27.3 |
| Panthera tigris | 43.5 | 56.5 | 108 | 43 | 90 | 106 | 26.3 |
| Papio hamadryas | 44.1 | 55.9 | 109 | 43 | 88 | 105 | 37.5 |
| Pecari tajacu | 41.2 | 58.8 | 104 | 39 | 89 | 115 | 31.5 |
| Peponocephala electra | 40.3 | 59.7 | 102 | 38 | 100 | 107 | 47.0 |
| Perameles gunnii | 34.2 | 65.8 | 81 | 39 | 115 | 116 | 6.1 |
| Perodicticus potto | 40.8 | 59.2 | 102 | 39 | 93 | 112 | 26.8 |