| Species (N=93) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Agkistrodon piscivorus | 41.8 | 58.2 | 426 | 133 | 324 | 455 | 24.5 |
| Alligator mississippiensis | 43.3 | 56.7 | 440 | 155 | 366 | 413 | 73.1 |
| Alligator sinensis | 46.1 | 53.9 | 462 | 171 | 361 | 380 | 60.7 |
| Anguis fragilis | 45.9 | 54.1 | 466 | 168 | 349 | 399 | 54.0 |
| Anolis carolinensis | 40.2 | 59.8 | 388 | 161 | 401 | 415 | 7.2 |
| Apalone ferox | 39.0 | 61.0 | 419 | 119 | 330 | 513 | 26.2 |
| Apalone spinifera | 39.2 | 60.8 | 415 | 126 | 338 | 502 | 25.2 |
| Basiliscus vittatus | 40.0 | 60.0 | 413 | 139 | 378 | 451 | 9.1 |
| Blanus cinereus | 43.2 | 56.8 | 459 | 134 | 333 | 448 | 16.0 |
| Boa constrictor | 38.3 | 61.7 | 381 | 138 | 342 | 495 | 40.4 |
| Bungarus fasciatus | 35.5 | 64.5 | 354 | 120 | 404 | 459 | 13.2 |
| Bungarus multicinctus | 38.1 | 61.9 | 387 | 122 | 390 | 438 | 13.7 |
| Caiman crocodilus | 46.9 | 53.1 | 485 | 159 | 307 | 423 | 24.1 |
| Calotes versicolor | 40.0 | 60.0 | 391 | 155 | 380 | 439 | 5.0 |
| Caretta caretta | 36.6 | 63.4 | 378 | 128 | 377 | 498 | 37.0 |
| Chamaeleo chamaeleon | 37.5 | 62.5 | 381 | 127 | 344 | 501 | 3.6 |
| Chamaeleo dilepis | 37.0 | 63.0 | 358 | 143 | 355 | 497 | 4.0 |
| Chelodina longicollis | 36.8 | 63.2 | 372 | 136 | 384 | 489 | 37.0 |
| Chelonia mydas | 37.6 | 62.4 | 391 | 128 | 366 | 496 | 75.0 |
| Chelus fimbriata | 39.3 | 60.7 | 411 | 132 | 357 | 481 | 35.8 |
| Chelydra serpentina | 35.8 | 64.2 | 357 | 138 | 395 | 494 | 47.0 |
| Chlamydosaurus kingii | 40.2 | 59.8 | 408 | 143 | 337 | 483 | 9.9 |
| Chrysemys picta | 39.4 | 60.6 | 399 | 145 | 356 | 481 | 61.0 |
| Coleonyx variegatus | 44.1 | 55.9 | 460 | 140 | 329 | 433 | 15.2 |
| Crocodylus acutus | 42.9 | 57.1 | 413 | 177 | 352 | 432 | 32.9 |
| Crocodylus intermedius | 43.2 | 56.8 | 413 | 181 | 351 | 429 | 21.8 |
| Crocodylus moreletii | 44.0 | 55.9 | 423 | 182 | 350 | 418 | 25.4 |
| Crocodylus niloticus | 42.5 | 57.5 | 412 | 172 | 353 | 437 | 43.8 |
| Crocodylus novaeguineae | 43.7 | 56.3 | 424 | 176 | 345 | 429 | 24.6 |
| Crocodylus palustris | 43.1 | 56.9 | 416 | 176 | 350 | 432 | 31.5 |
| Crocodylus porosus | 43.0 | 57.0 | 419 | 172 | 350 | 433 | 41.7 |
| Crocodylus rhombifer | 43.1 | 56.9 | 413 | 179 | 356 | 426 | 38.2 |
| Crocodylus siamensis | 42.9 | 57.1 | 418 | 171 | 350 | 435 | 21.9 |
| Crotalus horridus | 45.0 | 55.0 | 404 | 146 | 291 | 380 | 30.2 |
| Cuora amboinensis | 40.4 | 59.6 | 402 | 161 | 357 | 472 | 38.2 |
| Cuora flavomarginata | 39.3 | 60.7 | 373 | 168 | 374 | 462 | 19.1 |
| Cuora trifasciata | 39.9 | 60.1 | 382 | 168 | 364 | 463 | 31.8 |
| Cyclemys dentata | 38.9 | 61.1 | 368 | 168 | 376 | 465 | 14.7 |
| Daboia russellii | 39.0 | 61.0 | 391 | 131 | 387 | 429 | 15.0 |
| Gavialis gangeticus | 43.1 | 56.9 | 438 | 154 | 345 | 437 | 28.8 |