Table 2. Sequence identity (%) of KIR-related sequences from different Equids with the reference horse sequence.
| Equus grevyi | Equus zebra hartmannae | Equus burchellii antiquorum | Equus burchellii boehmi | Equus burchellii chapmani | Equus burchellii cunninghami | Equus asinus somalicus | Equus asinus | Equus kiang | Equus hemionus kulan | |
| KIR3DL | 99.25 | 99.22 | 99.16 | 99.18 | 99.22 | 99.09 | 99.20 | 99.12 | 99.00 | 99.08 |
| KIR-ILTA | 98.08 | 98.01 | 98.05 | 97.96 | 97.93 | 97.93 | 97.72 | 97.69 | 98.13 | 98.07 |
| KIRP1 | 97.92 | 97.93 | 97.81 | 97.69 | 97.65 | 97.87 | 97.92 | 97.96 | 97.36 | 97.79 |
| KIRP2 | 97.63 | 97.68 | 97.67 | 97.59 | 97.63 | 97.73 | 97.84 | 97.54 | 97.83 | 97.71 |