Table 2. Percent amino acid identities between Amcr-UA and class I sequences from other vertebrates.
| Species | Percent Identity with Amcr-UA | |||
| α1 | α2 | α3 | α1, α2, α3 | |
| Marine iguana (Amcr-UB) | 43.5–46.7 | 74.7–75.8 | 52.2 | 56.2–57.8 |
| Land iguana (Cosu-UB) | 45.7–50.0 | 68.1–75.8 | 56.5 | 57.8–60.0 |
| Green iguana (Igig-UB) | 46.7–48.9 | 73.6–76.7 | 53.3 | 57.8–59.5 |
| Ameiva Lizard (LC1) | 46.7 | 64.8 | 48.4 | 53.3 |
| Tuatara (Sppu-U) | 45.5–50.0 | 50.5 | 36.3 | 44.1–45.6 |
| Chicken (Gaga-B-F10) | 40.9 | 52.2 | 36.3 | 43.1 |
| Mallard (Anpl-Du2) | 45.5 | 56.0 | 40.7 | 47.4 |
| Warbler (Acar-cN3) | 43.2 | 46.2 | 44.0 | 44.4 |
| Axolotl (Amme-3) | 43.2 | 54.9 | 34.8 | 44.4 |
| Xenopus (Xela-UAA-1f) | 44.3 | 44.0 | 37.4 | 41.9 |
| Human (Hosa-HLA-A) | 43.7 | 53.8 | 38.0 | 45.2 |
| Mouse (Mumu-Q10) | 44.8 | 57.8 | 34.8 | 45.7 |
| Mouse (Mumu-H2K) | 43.7 | 52.2 | 31.5 | 42.4 |
| Wallaby (Maru-UB*01) | 40.0 | 54.9 | 38.0 | 44.3 |
| Platypus (Oran-2-1) | 40.9 | 56.0 | 32.6 | 43.2 |
| Possum (Trvu-UB) | 46.7 | 56.0 | 34.8 | 45.8 |
| Nurse Shark (Gici-UAA) | 41.4 | 44.0 | 32.2 | 39.2 |
| Rainbow Trout (Onmy-UBA) | 33.3 | 40.7 | 24.7 | 33.0 |
| Zebrafish (Dare-UBA) | 27.6 | 51.6 | 24.7 | 34.8 |
Values were calculated for each extracellular domain separately and for all three domains combined.