| Species (N=33) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Apalone ferox | 42.7 | 57.3 | 220 | 115 | 198 | 251 | 26.2 |
| Apalone spinifera | 43.4 | 56.6 | 223 | 117 | 196 | 248 | 25.2 |
| Caretta caretta | 41.8 | 58.2 | 215 | 113 | 208 | 248 | 37.0 |
| Chelodina longicollis | 40.3 | 59.7 | 203 | 113 | 214 | 254 | 37.0 |
| Chelonia mydas | 42.9 | 57.1 | 225 | 111 | 201 | 247 | 75.0 |
| Chelus fimbriata | 40.2 | 59.8 | 205 | 110 | 211 | 258 | 35.8 |
| Chelydra serpentina | 42.0 | 58.0 | 213 | 117 | 220 | 235 | 47.0 |
| Chrysemys picta | 41.8 | 58.2 | 211 | 117 | 221 | 235 | 61.0 |
| Cuora amboinensis | 42.2 | 57.8 | 211 | 120 | 216 | 237 | 38.2 |
| Cuora flavomarginata | 40.4 | 59.6 | 199 | 118 | 229 | 238 | 19.1 |
| Cuora trifasciata | 40.9 | 59.1 | 204 | 117 | 221 | 242 | 31.8 |
| Cyclemys dentata | 41.7 | 58.3 | 209 | 118 | 218 | 239 | 14.7 |
| Indotestudo forstenii | 41.6 | 58.4 | 206 | 120 | 214 | 244 | 32.9 |
| Kinosternon leucostomum | 39.2 | 60.8 | 197 | 110 | 228 | 249 | 19.2 |
| Lissemys punctata | 42.3 | 57.7 | 222 | 110 | 208 | 244 | 17.8 |
| Macrochelys temminckii | 41.2 | 58.8 | 199 | 113 | 216 | 229 | 70.3 |
| Malacochersus tornieri | 42.2 | 57.8 | 220 | 111 | 204 | 249 | 25.9 |
| Manouria emys | 44.1 | 55.9 | 219 | 127 | 209 | 229 | 19.9 |
| Mauremys japonica | 41.6 | 58.4 | 208 | 118 | 217 | 241 | 16.2 |
| Mauremys mutica | 42.8 | 57.2 | 215 | 121 | 212 | 237 | 22.1 |
| Notochelys platynota | 40.9 | 59.1 | 206 | 115 | 225 | 238 | 18.8 |
| Palea steindachneri | 43.3 | 56.7 | 222 | 116 | 201 | 242 | 41.0 |
| Pelomedusa subrufa | 40.1 | 59.9 | 215 | 99 | 229 | 241 | 20.1 |
| Pelusios castaneus | 42.3 | 57.7 | 233 | 99 | 221 | 232 | 41.0 |
| Platemys platycephala | 41.9 | 58.1 | 219 | 110 | 202 | 254 | 20.0 |
| Platysternon megacephalum | 43.5 | 56.5 | 211 | 130 | 219 | 224 | 27.0 |
| Sacalia bealei | 42.1 | 57.9 | 210 | 120 | 215 | 239 | 27.3 |
| Sternotherus carinatus | 40.7 | 59.3 | 209 | 110 | 214 | 251 | 29.3 |
| Testudo graeca | 42.2 | 57.8 | 209 | 122 | 212 | 241 | 127.0 |
| Testudo kleinmanni | 41.7 | 58.3 | 211 | 116 | 211 | 246 | 21.0 |
| Testudo marginata | 41.7 | 58.3 | 209 | 118 | 213 | 244 | 21.2 |
| Trachemys scripta | 42.2 | 57.8 | 216 | 115 | 214 | 239 | 41.3 |
| Trionyx triunguis | 46.7 | 53.3 | 240 | 126 | 187 | 231 | 50.6 |