| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Neophoca cinerea | 43.0 | 57.0 | 202 | 91 | 192 | 196 | 24.1 |
| Neophocaena phocaenoides | 41.1 | 58.9 | 203 | 77 | 193 | 208 | 33.0 |
| Neotragus moschatus | 40.7 | 59.3 | 198 | 79 | 187 | 217 | 13.5 |
| Neovison vison | 39.4 | 60.6 | 194 | 74 | 198 | 215 | 11.4 |
| Nyctalus noctula | 37.9 | 62.1 | 166 | 92 | 221 | 202 | 12.0 |
| Nyctereutes procyonoides | 42.3 | 57.7 | 207 | 81 | 200 | 193 | 16.6 |
| Nycticebus coucang | 41.0 | 59.0 | 200 | 79 | 193 | 209 | 25.8 |
| Ochotona princeps | 43.8 | 56.2 | 225 | 73 | 188 | 194 | 7.0 |
| Octodon degus | 36.1 | 63.9 | 174 | 72 | 220 | 215 | 14.0 |
| Odocoileus hemionus | 38.9 | 61.1 | 182 | 83 | 203 | 213 | 22.0 |
| Odocoileus virginianus | 38.5 | 61.2 | 179 | 83 | 203 | 214 | 23.0 |
| Okapia johnstoni | 42.7 | 57.3 | 205 | 86 | 178 | 212 | 33.5 |
| Orcaella brevirostris | 37.2 | 62.8 | 190 | 62 | 207 | 219 | 30.0 |
| Orcinus orca | 38.9 | 61.1 | 198 | 67 | 201 | 215 | 90.0 |
| Oreamnos americanus | 38.8 | 61.2 | 189 | 75 | 196 | 221 | 20.8 |
| Oreotragus oreotragus | 39.4 | 60.6 | 192 | 76 | 195 | 218 | 25.9 |
| Ornithorhynchus anatinus | 36.9 | 63.1 | 175 | 76 | 227 | 203 | 22.6 |
| Orycteropus afer | 36.9 | 63.1 | 182 | 69 | 205 | 225 | 29.8 |
| Oryctolagus cuniculus | 40.9 | 59.1 | 201 | 77 | 202 | 200 | 9.0 |
| Oryx dammah | 39.6 | 60.4 | 192 | 78 | 194 | 217 | 27.5 |
| Oryx gazella | 39.4 | 60.6 | 191 | 77 | 194 | 219 | 23.8 |
| Oryx leucoryx | 40.5 | 59.5 | 198 | 78 | 186 | 219 | 20.8 |
| Otolemur crassicaudatus | 43.8 | 56.2 | 221 | 77 | 181 | 202 | 22.7 |
| Ourebia ourebi | 42.7 | 57.3 | 212 | 79 | 179 | 211 | 15.9 |
| Ovibos moschatus | 39.6 | 60.4 | 195 | 75 | 190 | 221 | 27.4 |
| Ovis ammon | 40.5 | 59.5 | 197 | 78 | 190 | 214 | 16.8 |
| Ovis aries | 39.9 | 60.1 | 191 | 80 | 194 | 214 | 22.8 |
| Ovis canadensis | 39.8 | 60.2 | 196 | 75 | 192 | 218 | 20.6 |
| Ozotoceros bezoarticus | 37.4 | 62.6 | 177 | 78 | 208 | 218 | 21.9 |
| Pan paniscus | 43.3 | 56.7 | 222 | 73 | 182 | 204 | 55.0 |
| Pan troglodytes | 43.8 | 56.2 | 224 | 74 | 179 | 204 | 59.4 |
| Panthera leo | 41.9 | 58.1 | 199 | 86 | 198 | 198 | 27.0 |
| Panthera onca | 41.6 | 58.4 | 198 | 85 | 198 | 200 | 28.0 |
| Panthera pardus | 41.9 | 58.1 | 191 | 94 | 205 | 191 | 27.3 |
| Panthera tigris | 40.7 | 59.3 | 191 | 86 | 207 | 197 | 26.3 |
| Papio hamadryas | 44.1 | 55.9 | 236 | 64 | 161 | 219 | 37.5 |
| Pecari tajacu | 42.1 | 57.9 | 213 | 74 | 164 | 230 | 31.5 |
| Peponocephala electra | 38.5 | 61.5 | 195 | 67 | 204 | 215 | 47.0 |
| Perameles gunnii | 35.5 | 64.5 | 181 | 61 | 214 | 225 | 6.1 |
| Perodicticus potto | 40.4 | 59.6 | 208 | 67 | 189 | 217 | 26.8 |