| Species (N=93) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Agkistrodon piscivorus | 44.3 | 55.7 | 226 | 76 | 179 | 200 | 24.5 |
| Alligator mississippiensis | 43.5 | 56.5 | 229 | 66 | 179 | 204 | 73.1 |
| Alligator sinensis | 45.2 | 54.8 | 225 | 84 | 184 | 191 | 60.7 |
| Anguis fragilis | 44.6 | 55.4 | 229 | 76 | 180 | 199 | 54.0 |
| Anolis carolinensis | 36.0 | 64.0 | 170 | 76 | 227 | 211 | 7.2 |
| Apalone ferox | 40.2 | 59.8 | 214 | 61 | 162 | 247 | 26.2 |
| Apalone spinifera | 41.4 | 58.6 | 219 | 64 | 162 | 239 | 25.2 |
| Basiliscus vittatus | 41.7 | 58.3 | 209 | 76 | 191 | 207 | 9.1 |
| Blanus cinereus | 43.2 | 56.8 | 214 | 80 | 179 | 208 | 16.0 |
| Boa constrictor | 39.0 | 61.0 | 185 | 80 | 175 | 240 | 40.4 |
| Bungarus fasciatus | 34.1 | 65.9 | 167 | 65 | 213 | 235 | 13.2 |
| Bungarus multicinctus | 34.7 | 65.3 | 177 | 59 | 205 | 239 | 13.7 |
| Caiman crocodilus | 43.6 | 56.4 | 246 | 52 | 164 | 222 | 24.1 |
| Calotes versicolor | 41.1 | 58.9 | 208 | 72 | 179 | 223 | 5.0 |
| Caretta caretta | 37.7 | 62.3 | 204 | 53 | 186 | 239 | 37.0 |
| Chamaeleo chamaeleon | 37.9 | 62.1 | 192 | 62 | 173 | 243 | 3.6 |
| Chamaeleo dilepis | 36.4 | 63.6 | 184 | 62 | 180 | 249 | 4.0 |
| Chelodina longicollis | 36.5 | 63.5 | 184 | 67 | 195 | 241 | 37.0 |
| Chelonia mydas | 40.1 | 59.9 | 219 | 55 | 170 | 239 | 75.0 |
| Chelus fimbriata | 38.0 | 62.0 | 189 | 56 | 168 | 232 | 35.8 |
| Chelydra serpentina | 37.1 | 62.9 | 193 | 61 | 190 | 240 | 47.0 |
| Chlamydosaurus kingii | 37.3 | 62.7 | 211 | 44 | 181 | 248 | 9.9 |
| Chrysemys picta | 40.8 | 59.2 | 206 | 73 | 181 | 224 | 61.0 |
| Coleonyx variegatus | 42.4 | 57.6 | 217 | 71 | 197 | 195 | 15.2 |
| Crocodylus acutus | 42.8 | 57.2 | 216 | 82 | 175 | 223 | 32.9 |
| Crocodylus intermedius | 42.7 | 57.3 | 214 | 83 | 176 | 223 | 21.8 |
| Crocodylus moreletii | 43.8 | 56.2 | 218 | 87 | 173 | 218 | 25.4 |
| Crocodylus niloticus | 43.7 | 56.3 | 215 | 84 | 170 | 215 | 43.8 |
| Crocodylus novaeguineae | 42.8 | 57.2 | 213 | 85 | 173 | 225 | 24.6 |
| Crocodylus palustris | 43.1 | 56.9 | 211 | 84 | 169 | 220 | 31.5 |
| Crocodylus porosus | 42.8 | 57.2 | 216 | 77 | 168 | 223 | 41.7 |
| Crocodylus rhombifer | 44.4 | 55.6 | 213 | 96 | 177 | 210 | 38.2 |
| Crocodylus siamensis | 43.0 | 57.0 | 219 | 80 | 172 | 225 | 21.9 |
| Crotalus horridus | 39.8 | 60.2 | 204 | 67 | 181 | 229 | 30.2 |
| Cuora amboinensis | 38.3 | 61.7 | 198 | 64 | 189 | 233 | 38.2 |
| Cuora flavomarginata | 36.7 | 63.3 | 183 | 68 | 203 | 230 | 19.1 |
| Cuora trifasciata | 37.4 | 62.6 | 187 | 69 | 198 | 230 | 31.8 |
| Cyclemys dentata | 37.1 | 62.9 | 181 | 73 | 200 | 230 | 14.7 |
| Daboia russellii | 37.3 | 62.7 | 190 | 64 | 207 | 220 | 15.0 |
| Gavialis gangeticus | 39.4 | 60.6 | 202 | 72 | 190 | 231 | 28.8 |