| Species (N=919) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Mustela erminea | 39.1 | 60.9 | 191 | 75 | 199 | 216 | 12.5 |
| Mustela frenata | 39.2 | 60.8 | 191 | 76 | 201 | 213 | 8.8 |
| Mustela nigripes | 41.0 | 59.0 | 202 | 77 | 191 | 211 | 9.4 |
| Mustela nivalis | 40.7 | 59.3 | 195 | 82 | 202 | 202 | 9.1 |
| Mustela putorius | 40.4 | 59.6 | 199 | 76 | 194 | 212 | 11.1 |
| Mustela sibirica | 40.8 | 59.2 | 199 | 79 | 195 | 208 | 8.8 |
| Mustelus griseus | 35.7 | 64.3 | 173 | 71 | 232 | 208 | 9.0 |
| Mustelus manazo | 35.7 | 64.3 | 171 | 73 | 237 | 203 | 10.0 |
| Myrmecobius fasciatus | 39.5 | 60.5 | 197 | 72 | 200 | 212 | 11.0 |
| Mystacina tuberculata | 40.8 | 59.2 | 197 | 81 | 206 | 197 | 7.6 |
| Naemorhedus baileyi | 38.0 | 62.0 | 185 | 74 | 198 | 224 | 19.0 |
| Naemorhedus caudatus | 37.0 | 63.0 | 178 | 74 | 203 | 226 | 20.3 |
| Naemorhedus goral | 37.3 | 62.7 | 180 | 74 | 199 | 228 | 17.6 |
| Naja atra | 39.6 | 60.4 | 200 | 70 | 183 | 228 | 11.7 |
| Naja naja | 40.0 | 60.0 | 201 | 71 | 182 | 226 | 32.3 |
| Nandinia binotata | 40.5 | 59.5 | 207 | 69 | 188 | 217 | 21.0 |
| Nanger dama | 39.2 | 60.8 | 191 | 76 | 193 | 221 | 19.3 |
| Nanger granti | 38.9 | 61.1 | 189 | 76 | 195 | 221 | 19.7 |
| Nanger soemmerringii | 39.1 | 60.9 | 190 | 76 | 195 | 220 | 15.5 |
| Nannospalax ehrenbergi | 41.1 | 58.9 | 207 | 73 | 172 | 229 | 20.2 |
| Nasalis larvatus | 37.6 | 62.4 | 185 | 71 | 207 | 218 | 25.1 |
| Nasua nasua | 41.6 | 58.4 | 198 | 85 | 187 | 211 | 23.7 |
| Nemipterus japonicus | 43.7 | 56.3 | 205 | 94 | 199 | 186 | 8.0 |
| Neoceratodus forsteri | 44.0 | 56.0 | 204 | 97 | 169 | 214 | 19.7 |
| Neocyttus rhomboidalis | 42.3 | 57.7 | 207 | 82 | 218 | 176 | 100.0 |
| Neofelis nebulosa | 43.2 | 56.8 | 200 | 94 | 194 | 193 | 19.8 |
| Neomys fodiens | 37.9 | 62.1 | 185 | 73 | 212 | 211 | 3.1 |
| Neophoca cinerea | 43.0 | 57.0 | 202 | 91 | 192 | 196 | 24.1 |
| Neophocaena phocaenoides | 41.1 | 58.9 | 203 | 77 | 193 | 208 | 33.0 |
| Neotragus moschatus | 40.7 | 59.3 | 198 | 79 | 187 | 217 | 13.5 |
| Neovison vison | 39.4 | 60.6 | 194 | 74 | 198 | 215 | 11.4 |
| Nerodia sipedon | 41.9 | 58.1 | 211 | 74 | 173 | 223 | 9.6 |
| Netta rufina | 47.1 | 52.9 | 251 | 71 | 162 | 200 | 8.8 |
| Nipponia nippon | 47.5 | 52.5 | 251 | 74 | 157 | 202 | 25.8 |
| Notemigonus crysoleucas | 42.4 | 57.6 | 192 | 98 | 198 | 196 | 9.0 |
| Nothobranchius furzeri | 38.1 | 61.9 | 185 | 75 | 222 | 201 | 1.1 |
| Notochelys platynota | 36.7 | 63.3 | 185 | 66 | 203 | 230 | 18.8 |
| Notorynchus cepedianus | 37.0 | 63.0 | 183 | 70 | 230 | 201 | 49.0 |
| Notropis stramineus | 44.0 | 56.0 | 193 | 108 | 211 | 172 | 3.0 |
| Nucifraga columbiana | 44.7 | 55.3 | 237 | 69 | 169 | 209 | 17.4 |