| Cartilaginous fish classical | Gar DA/DB | Gar DE | Teleost fish DA | Teleost fish DB | Teleost fish DE | Tetrapods classical | Mammals DO | Tetrapods DM |
---|---|---|---|---|---|---|---|---|---|
Located at Mhc | + a | (+) b | (+) b | ― | ― | + | + | + | + |
Linked with classical-type class I | + a | + | + | ― | ― | ― | + | + | + |
Classical-type polymorphism | + a |  |  | + | ― | ― | + | ― | ― |
Expression | + a | Â | Â | high | low-med | low | high | med | med |
Peptide-binding residues c | + | (+) d | (+) | + | (―) | (―) | + | (―) | ― |
CD4-binding βS144, βE162 | ― |  | + | + | + /― e | + | + | + | ― |
Endosomal sorting motif f | ― |  |  | ― | + /― e | ― | ― | ― | + |
αW43 | ― | ― | ― | ― | + /― e | ― | + | + | ― |
Amino acid at α125 | G | N | D | G | HNDKG | D | NK | ND | N |