Table 4.
Numbers of amino acid sites under positive and negative selection identified in MHC DRB and DQB exon 2 sequences in equids
| Selection | Positive | Negative | ||
|---|---|---|---|---|
| Locus/sub-region | DRB | DQB | DRB | DQB |
| 1 | 11 | 9 | 7 | 5 |
| 2 | 6 | 7 | 3 | 7 |
| 3 | 1 | 0 | 4 | 4 |
| Sub-region | 11 | 15 | 15 | 13 |
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