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Conservation of PB2 protein phosphorylation site S181 in IAV.
| Subtype | Host | Number of strains | Conservation |
|---|---|---|---|
| H5 | Any | 5216 | 99.87% |
| Human | 254 | 100% | |
| Avian | 4645 | 99.85% | |
| H9N2 | Any | 2201 | 99.41% |
| Human | 15 | 100% | |
| Avian | 2138 | 99.63% | |
| H3N2 | Any | 23949 | 99.766% |
| Human | 20926 | 99.852% | |
| Avian | 375 | 96.3% | |
| H7N9 | Any | 852 | 99.9% |
| Human | 125 | 99.2% | |
| Avian | 693 | 100% | |
| H1N1 | Any | 18880 | 99.878% |
| Human | 15023 | 99.953% | |
| Avian | 628 | 100% |
