| Species (N=390) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Martes foina | 42.8 | 57.2 | 86 | 41 | 91 | 79 | 18.2 |
| Martes martes | 43.1 | 56.9 | 86 | 42 | 92 | 77 | 18.2 |
| Martes pennanti | 41.8 | 58.2 | 86 | 38 | 89 | 84 | 14.3 |
| Martes zibellina | 42.6 | 57.4 | 83 | 43 | 95 | 75 | 18.4 |
| Mazama americana | 35.4 | 64.6 | 69 | 36 | 96 | 96 | 17.1 |
| Megaptera novaeangliae | 41.8 | 58.2 | 88 | 36 | 88 | 85 | 95.0 |
| Meles meles | 37.0 | 63.0 | 79 | 31 | 98 | 89 | 18.6 |
| Melogale moschata | 40.7 | 59.3 | 77 | 44 | 94 | 82 | 19.0 |
| Melursus ursinus | 41.1 | 58.9 | 77 | 45 | 96 | 79 | 33.3 |
| Mephitis mephitis | 31.3 | 68.7 | 61 | 32 | 110 | 94 | 13.9 |
| Meriones unguiculatus | 36.0 | 64.0 | 71 | 36 | 101 | 89 | 6.3 |
| Mesocricetus auratus | 33.3 | 66.7 | 67 | 32 | 104 | 94 | 3.9 |
| Mesoplodon europaeus | 37.7 | 62.3 | 75 | 37 | 99 | 86 | 48.0 |
| Metachirus nudicaudatus | 31.6 | 68.4 | 61 | 33 | 107 | 96 | 3.0 |
| Mogera wogura | 32.3 | 67.7 | 65 | 31 | 110 | 91 | 3.2 |
| Monodelphis domestica | 35.0 | 65.0 | 67 | 37 | 100 | 93 | 5.1 |
| Monodon monoceros | 39.7 | 60.3 | 86 | 32 | 88 | 91 | 50.0 |
| Muntiacus muntjak | 36.7 | 63.3 | 71 | 38 | 98 | 90 | 18.8 |
| Muntiacus reevesi | 36.4 | 63.6 | 70 | 38 | 100 | 89 | 23.2 |
| Mus musculus | 41.1 | 58.9 | 89 | 33 | 86 | 89 | 4.0 |
| Mustela erminea | 39.7 | 60.3 | 82 | 36 | 94 | 85 | 12.5 |
| Mustela frenata | 36.7 | 63.3 | 77 | 32 | 98 | 90 | 8.8 |
| Mustela nigripes | 38.0 | 62.0 | 78 | 35 | 99 | 85 | 9.4 |
| Mustela nivalis | 40.1 | 59.9 | 83 | 36 | 93 | 85 | 9.1 |
| Mustela putorius | 38.7 | 61.3 | 79 | 36 | 98 | 84 | 11.1 |
| Mustela sibirica | 39.7 | 60.3 | 83 | 35 | 93 | 86 | 8.8 |
| Myrmecobius fasciatus | 36.7 | 63.3 | 75 | 34 | 93 | 95 | 11.0 |
| Mystacina tuberculata | 37.7 | 62.3 | 71 | 41 | 96 | 89 | 7.6 |
| Naemorhedus baileyi | 36.7 | 63.3 | 69 | 40 | 99 | 89 | 19.0 |
| Naemorhedus caudatus | 36.0 | 64.0 | 71 | 36 | 97 | 93 | 20.3 |
| Naemorhedus goral | 37.0 | 63.0 | 74 | 36 | 94 | 93 | 17.6 |
| Nandinia binotata | 38.0 | 62.0 | 80 | 33 | 95 | 89 | 21.0 |
| Nanger dama | 35.4 | 64.6 | 70 | 35 | 96 | 96 | 19.3 |
| Nanger granti | 35.4 | 64.6 | 70 | 35 | 96 | 96 | 19.7 |
| Nanger soemmerringii | 36.0 | 64.0 | 69 | 38 | 97 | 93 | 15.5 |
| Nannospalax ehrenbergi | 35.7 | 64.3 | 75 | 31 | 97 | 94 | 20.2 |
| Nasalis larvatus | 37.4 | 62.6 | 75 | 36 | 97 | 89 | 25.1 |
| Nasua nasua | 41.1 | 58.9 | 85 | 37 | 94 | 81 | 23.7 |
| Neofelis nebulosa | 38.0 | 62.0 | 75 | 38 | 94 | 90 | 19.8 |
| Neomys fodiens | 35.4 | 64.6 | 64 | 41 | 106 | 86 | 3.1 |