 
			| Species (N=919) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) | 
|---|---|---|---|---|---|---|---|
| Bos grunniens | 41.2 | 58.8 | 277 | 117 | 253 | 309 | 26.3 | 
| Bos javanicus | 40.6 | 59.4 | 267 | 121 | 264 | 304 | 27.1 | 
| Bos taurus | 40.7 | 59.3 | 266 | 123 | 264 | 303 | 20.0 | 
| Boselaphus tragocamelus | 40.8 | 59.2 | 277 | 113 | 254 | 313 | 21.7 | 
| Botaurus stellaris | 45.8 | 54.2 | 330 | 118 | 261 | 269 | 11.3 | 
| Branchiostegus japonicus | 47.2 | 52.8 | 313 | 147 | 256 | 259 | 12.0 | 
| Branta bernicla | 46.8 | 53.2 | 304 | 154 | 257 | 263 | 28.8 | 
| Branta canadensis | 47.9 | 52.1 | 315 | 153 | 249 | 261 | 42.0 | 
| Bubalus bubalis | 42.2 | 57.8 | 285 | 119 | 248 | 305 | 34.9 | 
| Bubalus depressicornis | 41.4 | 58.6 | 276 | 120 | 256 | 305 | 36.1 | 
| Bubulcus ibis | 46.3 | 53.7 | 324 | 129 | 265 | 260 | 23.0 | 
| Bucorvus leadbeateri | 49.7 | 50.3 | 344 | 142 | 237 | 255 | 70.0 | 
| Budorcas taxicolor | 39.2 | 60.8 | 273 | 102 | 271 | 310 | 21.9 | 
| Bungarus fasciatus | 36.7 | 63.3 | 260 | 94 | 271 | 339 | 13.2 | 
| Bungarus multicinctus | 38.2 | 61.8 | 260 | 108 | 278 | 318 | 13.7 | 
| Buteo buteo | 47.5 | 52.5 | 339 | 126 | 247 | 266 | 28.8 | 
| Cacajao calvus | 40.7 | 59.3 | 281 | 108 | 266 | 301 | 35.8 | 
| Cacatua moluccensis | 47.8 | 52.2 | 338 | 131 | 248 | 264 | 65.8 | 
| Caenorhabditis elegans | 25.2 | 74.8 | 92 | 129 | 402 | 253 | 0.2 | 
| Caiman crocodilus | 43.5 | 56.5 | 300 | 120 | 254 | 292 | 24.1 | 
| Callicebus cupreus | 39.3 | 60.7 | 268 | 105 | 284 | 292 | 26.4 | 
| Callicebus donacophilus | 40.8 | 59.2 | 282 | 105 | 268 | 294 | 25.0 | 
| Callimico goeldii | 39.0 | 61.0 | 273 | 99 | 274 | 309 | 22.2 | 
| Callithrix geoffroyi | 42.3 | 57.7 | 299 | 105 | 250 | 302 | 17.6 | 
| Callithrix jacchus | 41.6 | 58.4 | 292 | 106 | 257 | 301 | 22.8 | 
| Callithrix pygmaea | 40.3 | 59.7 | 278 | 107 | 267 | 304 | 18.6 | 
| Callorhinchus capensis | 34.8 | 65.2 | 223 | 111 | 348 | 278 | 12.0 | 
| Callorhinchus milii | 34.3 | 65.7 | 217 | 112 | 354 | 277 | 6.0 | 
| Callosciurus erythraeus | 41.2 | 58.8 | 281 | 113 | 283 | 280 | 17.0 | 
| Calotes versicolor | 39.9 | 60.1 | 260 | 125 | 262 | 319 | 5.0 | 
| Calyptorhynchus baudinii | 45.9 | 54.1 | 333 | 117 | 246 | 285 | 47.0 | 
| Camelus bactrianus | 45.4 | 54.6 | 299 | 135 | 257 | 265 | 35.4 | 
| Camelus dromedarius | 46.2 | 53.8 | 309 | 133 | 245 | 269 | 28.4 | 
| Canis latrans | 41.1 | 58.9 | 275 | 118 | 284 | 280 | 21.8 | 
| Canis lupus | 41.0 | 59.0 | 280 | 112 | 279 | 286 | 20.6 | 
| Capra caucasica | 39.6 | 60.4 | 273 | 106 | 269 | 308 | 19.3 | 
| Capra falconeri | 40.1 | 59.8 | 277 | 106 | 264 | 308 | 19.1 | 
| Capra hircus | 39.5 | 60.5 | 268 | 110 | 274 | 304 | 20.8 | 
| Capra ibex | 40.1 | 59.9 | 274 | 109 | 269 | 304 | 20.9 | 
| Capra nubiana | 40.8 | 58.9 | 280 | 110 | 262 | 301 | 22.4 | 
