| Species (N=94) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Agkistrodon piscivorus | 41.2 | 58.8 | 345 | 243 | 365 | 474 | 24.5 |
| Alligator mississippiensis | 43.2 | 56.8 | 414 | 273 | 379 | 523 | 73.1 |
| Alligator sinensis | 44.8 | 55.2 | 691 | 404 | 612 | 736 | 60.7 |
| Anguis fragilis | 40.3 | 59.7 | 352 | 268 | 401 | 517 | 54.0 |
| Anolis carolinensis | 36.8 | 63.1 | 324 | 236 | 425 | 534 | 7.2 |
| Apalone ferox | 37.4 | 62.6 | 353 | 228 | 420 | 552 | 26.2 |
| Apalone spinifera | 38.1 | 61.9 | 354 | 234 | 414 | 543 | 25.2 |
| Basiliscus vittatus | 41.1 | 58.9 | 379 | 253 | 385 | 520 | 9.1 |
| Blanus cinereus | 46.0 | 54.0 | 413 | 278 | 347 | 463 | 16.0 |
| Boa constrictor | 41.2 | 58.8 | 356 | 249 | 360 | 502 | 40.4 |
| Bungarus fasciatus | 39.6 | 60.4 | 340 | 228 | 383 | 483 | 13.2 |
| Bungarus multicinctus | 40.6 | 59.4 | 333 | 246 | 382 | 466 | 13.7 |
| Caiman crocodilus | 44.0 | 56.0 | 417 | 270 | 367 | 507 | 24.1 |
| Calotes versicolor | 41.9 | 58.1 | 364 | 252 | 360 | 493 | 5.0 |
| Caretta caretta | 39.4 | 60.6 | 369 | 240 | 387 | 550 | 37.0 |
| Carettochelys insculpta | 39.0 | 61.0 | 367 | 236 | 403 | 541 | 38.4 |
| Chamaeleo chamaeleon | 40.5 | 59.5 | 348 | 255 | 377 | 508 | 3.6 |
| Chamaeleo dilepis | 40.4 | 59.6 | 352 | 251 | 382 | 508 | 4.0 |
| Chelodina longicollis | 37.7 | 62.3 | 353 | 229 | 401 | 559 | 37.0 |
| Chelonia mydas | 38.7 | 61.3 | 365 | 234 | 392 | 558 | 75.0 |
| Chelus fimbriata | 38.6 | 61.4 | 364 | 234 | 395 | 555 | 35.8 |
| Chelydra serpentina | 38.2 | 61.8 | 351 | 239 | 416 | 540 | 47.0 |
| Chlamydosaurus kingii | 41.8 | 58.2 | 375 | 245 | 365 | 499 | 9.9 |
| Chrysemys picta | 37.7 | 62.3 | 340 | 243 | 426 | 539 | 61.0 |
| Coleonyx variegatus | 42.7 | 57.3 | 399 | 257 | 377 | 505 | 15.2 |
| Crocodylus acutus | 42.5 | 57.5 | 380 | 276 | 397 | 492 | 32.9 |
| Crocodylus intermedius | 42.7 | 57.3 | 380 | 279 | 396 | 490 | 21.8 |
| Crocodylus moreletii | 43.0 | 56.9 | 384 | 281 | 392 | 488 | 25.4 |
| Crocodylus niloticus | 42.8 | 57.2 | 382 | 282 | 395 | 491 | 43.8 |
| Crocodylus novaeguineae | 43.2 | 56.8 | 388 | 280 | 390 | 487 | 24.6 |
| Crocodylus palustris | 43.3 | 56.7 | 384 | 283 | 390 | 483 | 31.5 |
| Crocodylus porosus | 43.7 | 56.3 | 3134 | 1685 | 2782 | 3423 | 41.7 |
| Crocodylus rhombifer | 42.8 | 57.2 | 382 | 279 | 395 | 487 | 38.2 |
| Crocodylus siamensis | 43.0 | 57.0 | 387 | 277 | 396 | 483 | 21.9 |
| Crotalus horridus | 41.4 | 58.6 | 357 | 233 | 358 | 477 | 30.2 |
| Cuora amboinensis | 38.5 | 61.5 | 351 | 245 | 410 | 541 | 38.2 |
| Cuora flavomarginata | 37.6 | 62.4 | 343 | 240 | 415 | 552 | 19.1 |
| Cuora trifasciata | 38.6 | 61.4 | 355 | 243 | 407 | 545 | 31.8 |
| Cyclemys dentata | 37.4 | 62.4 | 345 | 234 | 417 | 549 | 14.7 |
| Daboia russellii | 39.5 | 60.5 | 325 | 230 | 381 | 470 | 15.0 |