| Species (N=93) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Agkistrodon piscivorus | 42.1 | 57.9 | 342 | 92 | 226 | 370 | 24.5 |
| Alligator mississippiensis | 39.7 | 60.3 | 320 | 102 | 289 | 351 | 73.1 |
| Alligator sinensis | 45.1 | 54.9 | 350 | 130 | 272 | 313 | 60.7 |
| Anguis fragilis | 46.1 | 53.9 | 353 | 124 | 231 | 327 | 54.0 |
| Anolis carolinensis | 36.7 | 63.3 | 278 | 102 | 311 | 345 | 7.2 |
| Apalone ferox | 37.7 | 62.3 | 307 | 85 | 248 | 399 | 26.2 |
| Apalone spinifera | 37.9 | 62.1 | 309 | 85 | 247 | 398 | 25.2 |
| Basiliscus vittatus | 40.6 | 59.4 | 319 | 102 | 243 | 372 | 9.1 |
| Blanus cinereus | 43.8 | 56.2 | 343 | 113 | 219 | 365 | 16.0 |
| Boa constrictor | 39.4 | 60.6 | 300 | 106 | 217 | 407 | 40.4 |
| Bungarus fasciatus | 33.8 | 66.2 | 268 | 80 | 279 | 403 | 13.2 |
| Bungarus multicinctus | 37.0 | 63.0 | 280 | 101 | 266 | 383 | 13.7 |
| Caiman crocodilus | 42.9 | 57.1 | 341 | 113 | 283 | 322 | 24.1 |
| Calotes versicolor | 40.8 | 59.2 | 305 | 112 | 248 | 358 | 5.0 |
| Caretta caretta | 38.8 | 61.2 | 322 | 82 | 249 | 389 | 37.0 |
| Chamaeleo chamaeleon | 36.8 | 63.2 | 287 | 95 | 267 | 390 | 3.6 |
| Chamaeleo dilepis | 34.5 | 65.5 | 269 | 89 | 276 | 405 | 4.0 |
| Chelodina longicollis | 38.7 | 61.3 | 290 | 114 | 277 | 363 | 37.0 |
| Chelonia mydas | 38.6 | 61.4 | 324 | 77 | 245 | 393 | 75.0 |
| Chelus fimbriata | 38.0 | 62.0 | 301 | 98 | 264 | 387 | 35.8 |
| Chelydra serpentina | 36.0 | 64.0 | 286 | 88 | 277 | 388 | 47.0 |
| Chlamydosaurus kingii | 41.7 | 58.3 | 337 | 94 | 227 | 375 | 9.9 |
| Chrysemys picta | 38.1 | 61.9 | 314 | 82 | 248 | 395 | 61.0 |
| Coleonyx variegatus | 43.4 | 56.6 | 347 | 105 | 218 | 372 | 15.2 |
| Crocodylus acutus | 44.2 | 55.8 | 342 | 125 | 266 | 323 | 32.9 |
| Crocodylus intermedius | 44.5 | 55.5 | 343 | 127 | 266 | 320 | 21.8 |
| Crocodylus moreletii | 43.8 | 56.3 | 337 | 125 | 270 | 324 | 25.4 |
| Crocodylus niloticus | 44.4 | 55.6 | 343 | 126 | 266 | 321 | 43.8 |
| Crocodylus novaeguineae | 44.0 | 56.0 | 346 | 119 | 263 | 328 | 24.6 |
| Crocodylus palustris | 43.8 | 56.3 | 338 | 124 | 271 | 323 | 31.5 |
| Crocodylus porosus | 44.0 | 56.0 | 340 | 125 | 270 | 321 | 41.7 |
| Crocodylus rhombifer | 44.2 | 55.8 | 335 | 130 | 270 | 318 | 38.2 |
| Crocodylus siamensis | 43.9 | 56.1 | 341 | 123 | 269 | 323 | 21.9 |
| Crotalus horridus | 43.8 | 56.2 | 358 | 96 | 225 | 357 | 30.2 |
| Cuora amboinensis | 39.3 | 60.7 | 311 | 98 | 253 | 380 | 38.2 |
| Cuora flavomarginata | 39.3 | 60.7 | 308 | 101 | 257 | 375 | 19.1 |
| Cuora trifasciata | 39.8 | 60.2 | 312 | 102 | 249 | 376 | 31.8 |
| Cyclemys dentata | 38.8 | 61.2 | 301 | 103 | 258 | 380 | 14.7 |
| Daboia russellii | 38.8 | 61.2 | 325 | 75 | 260 | 370 | 15.0 |
| Gavialis gangeticus | 41.8 | 58.2 | 330 | 107 | 285 | 324 | 28.8 |