Interspecies Comparison of Amino Acid Sequences in the COX I Region
| Bacillus subtilis | S | M | V | F | A | I | V | L | I | G | F | L | G | F | M | V | W | V | H | H | M |
| Escherichia coli | S | L | V | W | A | T | V | C | I | T | V | L | S | F | I | V | W | L | H | H | F |
| Paracoccus denitrificans | P | M | V | L | A | M | A | A | I | A | F | L | G | F | I | V | W | A | H | H | M |
| Thermus thermophilus | Q | M | V | W | A | Q | M | G | I | V | V | L | G | T | M | V | W | A | H | H | M |
| Chlamydomonas reinhardtii | G | M | I | C | A | M | G | A | I | S | L | L | G | F | I | V | W | A | H | H | M |
| Yeast (Saccharomyces cerevisiae) | S | M | V | Y | A | M | A | S | I | G | L | L | G | F | L | V | W | S | H | H | M |
| Wheat (Triticum aestivum) | G | M | V | Y | A | M | I | S | I | G | V | L | G | F | L | V | W | A | H | H | M |
| Drosophila melanogaster | G | M | I | Y | A | M | L | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Honey bee (Apis mellifera) | S | M | I | Y | A | M | L | G | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Worm (Strongyloides purpuratus) | G | L | V | Y | A | M | I | A | I | G | V | L | G | F | L | V | W | A | H | H | M |
| Worm (Lumbricus terrestris) | G | M | I | Y | A | M | L | G | I | A | V | L | G | F | I | V | W | A | H | H | M |
| Sea urchin (Paracentrotus lividus) | G | M | V | Y | A | M | I | A | I | G | V | L | G | F | L | V | W | A | H | H | M |
| Cod (Gadus morhua) | G | M | V | W | A | M | M | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Carp (Cyprinus carpio) | G | M | V | W | A | M | M | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Trout (Oncorhynchus mykiss) | G | M | V | W | A | M | M | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Frog (Xenopus laevis) | G | M | V | W | A | M | M | S | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Seal (Phoca vitulina) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Whale (Balaenoptera musculus) | G | M | I | W | A | M | V | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Chicken (Gallus gallus) | G | M | V | W | A | M | L | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Mouse (Mus musculus) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Opossum (Didelphis virginiana) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Rhinoceros unicornis | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Cattle (Bos taurus) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Gorilla (G gorilla) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Chimpanzee (Pan troglodytes) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Man (Homo sapiens) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Patient no. 1 | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| T | |||||||||||||||||||||
| Patient no. 2 | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| T | |||||||||||||||||||||
| Bacillus subtilis | S | M | V | F | A | I | V | L | I | G | F | L | G | F | M | V | W | V | H | H | M |
| Escherichia coli | S | L | V | W | A | T | V | C | I | T | V | L | S | F | I | V | W | L | H | H | F |
| Paracoccus denitrificans | P | M | V | L | A | M | A | A | I | A | F | L | G | F | I | V | W | A | H | H | M |
| Thermus thermophilus | Q | M | V | W | A | Q | M | G | I | V | V | L | G | T | M | V | W | A | H | H | M |
| Chlamydomonas reinhardtii | G | M | I | C | A | M | G | A | I | S | L | L | G | F | I | V | W | A | H | H | M |
| Yeast (Saccharomyces cerevisiae) | S | M | V | Y | A | M | A | S | I | G | L | L | G | F | L | V | W | S | H | H | M |
| Wheat (Triticum aestivum) | G | M | V | Y | A | M | I | S | I | G | V | L | G | F | L | V | W | A | H | H | M |
| Drosophila melanogaster | G | M | I | Y | A | M | L | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Honey bee (Apis mellifera) | S | M | I | Y | A | M | L | G | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Worm (Strongyloides purpuratus) | G | L | V | Y | A | M | I | A | I | G | V | L | G | F | L | V | W | A | H | H | M |
| Worm (Lumbricus terrestris) | G | M | I | Y | A | M | L | G | I | A | V | L | G | F | I | V | W | A | H | H | M |
| Sea urchin (Paracentrotus lividus) | G | M | V | Y | A | M | I | A | I | G | V | L | G | F | L | V | W | A | H | H | M |
| Cod (Gadus morhua) | G | M | V | W | A | M | M | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Carp (Cyprinus carpio) | G | M | V | W | A | M | M | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Trout (Oncorhynchus mykiss) | G | M | V | W | A | M | M | A | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Frog (Xenopus laevis) | G | M | V | W | A | M | M | S | I | G | L | L | G | F | I | V | W | A | H | H | M |
| Seal (Phoca vitulina) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Whale (Balaenoptera musculus) | G | M | I | W | A | M | V | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Chicken (Gallus gallus) | G | M | V | W | A | M | L | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Mouse (Mus musculus) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Opossum (Didelphis virginiana) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Rhinoceros unicornis | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Cattle (Bos taurus) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Gorilla (G gorilla) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Chimpanzee (Pan troglodytes) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Man (Homo sapiens) | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| Patient no. 1 | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| T | |||||||||||||||||||||
| Patient no. 2 | G | M | V | W | A | M | M | S | I | G | F | L | G | F | I | V | W | A | H | H | M |
| T | |||||||||||||||||||||
The amino acids mutated in patients no. 1 and 2, Met273 and Ile280 according to the human sequence, have been strongly conserved during evolution. Sequence data are from earlier studies.29 72-93