Table 7.
Frequency Range of Selected Amino Acids among All Mitochondrial Proteins for Taxonomic Groups
| Taxon | Ala | Arg | Asn | Gly | Ile | Pro | Tyr |
| Fishes | 325–353 | 69–79 | 112–121 | 236–249 | 242–307 | 206–230 | 97–114 |
| Coelacanth | 285 | 73 | 147 | 239 | 284 | 205 | 116 |
| Amphibians | 274–321 | 68–70 | 136–148 | 224–227 | 273–334 | 203–220 | 111–116 |
| Reptiles | 243–322 | 71 | 132–138 | 225–227 | 279–300 | 204–208 | 111–125 |
| Birds | 289–301 | 72 | 126–130 | 215–221 | 301–304 | 221–234 | 105–108 |
| Mammals | 226–263 | 62–67 | 143–169 | 208–224 | 312–378 | 187–224 | 153–189 |











