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The frequency of amino acids at indicated positions in H5N1 HAs isolated from humans and birds
| Frequency of occurrence (%) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Position | 90 | 128 | 159 | 160 | 217 | 316 | ||||||||
| aa | Ala | Val | Thr | Asp | Ser | Asn | Ser | Asp | Ala | Thr | Ile | Leu | Ile | Val |
| Human | 29.1 | 16.5 | 54.4 | 79 | 21 | 24.2 | 75.8 | 0 | 16.5 | 83.5 | 100 | 0 | 100 | 0 |
| Avian | 88 | 12 | 0 | 81 | 19 | 53 | 15 | 32 | 65 | 35 | 99 | 1 | 95 | 5 |
