| Species (N=919) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Ourebia ourebi | 42.3 | 57.7 | 275 | 129 | 255 | 297 | 15.9 |
| Ovibos moschatus | 41.3 | 58.7 | 274 | 121 | 268 | 293 | 27.4 |
| Ovis ammon | 39.8 | 60.2 | 275 | 105 | 269 | 306 | 16.8 |
| Ovis aries | 40.6 | 59.4 | 280 | 108 | 264 | 303 | 22.8 |
| Ovis canadensis | 40.4 | 59.6 | 279 | 107 | 264 | 306 | 20.6 |
| Ovophis okinavensis | 42.2 | 57.8 | 301 | 105 | 255 | 300 | 19.0 |
| Ozotoceros bezoarticus | 35.3 | 64.7 | 227 | 110 | 310 | 309 | 21.9 |
| Pagellus bogaraveo | 49.0 | 51.0 | 316 | 162 | 284 | 213 | 15.0 |
| Palea steindachneri | 40.1 | 59.9 | 279 | 111 | 277 | 306 | 41.0 |
| Paleosuchus palpebrosus | 49.6 | 50.4 | 348 | 131 | 233 | 254 | 24.1 |
| Paleosuchus trigonatus | 48.3 | 51.7 | 340 | 127 | 238 | 261 | 30.9 |
| Pan paniscus | 44.8 | 55.2 | 323 | 105 | 244 | 283 | 55.0 |
| Pan troglodytes | 45.9 | 54.1 | 330 | 109 | 240 | 278 | 59.4 |
| Pandion haliaetus | 45.1 | 54.9 | 321 | 119 | 258 | 277 | 32.0 |
| Panthera leo | 43.4 | 56.6 | 299 | 116 | 252 | 289 | 27.0 |
| Panthera onca | 44.7 | 55.3 | 305 | 122 | 246 | 283 | 28.0 |
| Panthera pardus | 43.5 | 56.5 | 297 | 119 | 254 | 286 | 27.3 |
| Panthera tigris | 42.1 | 57.9 | 289 | 113 | 259 | 295 | 26.3 |
| Papio hamadryas | 44.2 | 55.8 | 318 | 104 | 244 | 289 | 37.5 |
| Parus major | 49.8 | 50.2 | 353 | 134 | 234 | 257 | 15.4 |
| Passer domesticus | 47.6 | 52.4 | 316 | 150 | 249 | 263 | 23.0 |
| Passer montanus | 50.3 | 49.7 | 325 | 167 | 240 | 246 | 13.1 |
| Pavo cristatus | 45.5 | 54.5 | 325 | 118 | 265 | 266 | 23.2 |
| Pecari tajacu | 40.5 | 59.5 | 268 | 120 | 251 | 318 | 31.5 |
| Pelecus cultratus | 44.5 | 55.5 | 273 | 161 | 278 | 263 | 11.0 |
| Pelomedusa subrufa | 39.5 | 60.5 | 270 | 112 | 298 | 288 | 20.1 |
| Pelusios castaneus | 41.0 | 59.0 | 285 | 114 | 298 | 275 | 41.0 |
| Peponocephala electra | 41.3 | 58.7 | 286 | 109 | 259 | 303 | 47.0 |
| Perameles gunnii | 34.0 | 66.0 | 218 | 107 | 319 | 313 | 6.1 |
| Perca flavescens | 46.2 | 53.8 | 289 | 161 | 303 | 222 | 12.0 |
| Perca fluviatilis | 45.9 | 54.1 | 293 | 155 | 299 | 228 | 22.0 |
| Percopsis transmontana | 53.1 | 46.9 | 346 | 172 | 217 | 240 | 6.0 |
| Periparus ater | 50.1 | 49.9 | 355 | 135 | 228 | 260 | 9.5 |
| Perodicticus potto | 42.8 | 57.2 | 296 | 114 | 251 | 296 | 26.8 |
| Petaurista alborufus | 41.1 | 58.9 | 282 | 111 | 264 | 300 | 21.4 |
| Petaurus breviceps | 36.7 | 63.3 | 247 | 104 | 298 | 308 | 17.8 |
| Petromyzon marinus | 36.6 | 63.4 | 225 | 129 | 323 | 289 | 9.0 |
| Phacochoerus africanus | 42.3 | 57.7 | 289 | 115 | 237 | 314 | 20.9 |
| Phaeognathus hubrichti | 35.0 | 65.0 | 220 | 120 | 332 | 300 | 19.7 |
| Phaethon rubricauda | 49.8 | 50.2 | 356 | 131 | 232 | 259 | 32.7 |