From: Characterization of H5N1 influenza viruses isolated from humans in vitro
 |  | Pathogenicity |  |  |  |  |  |  | |
---|---|---|---|---|---|---|---|---|---|
Protein | Position | Low | High | SP83 | KAN353 | Thai1623 | KK494 | PCBR2031 | SP528 |
PB2 | 627 | E | K | E | K | K | K | K | E |
 | 701 | D | N | D | D | D | D | D | N |
PB1-F2 | 66 | N | S | N | N | N | N | N | N |
NS1 | 92 | D | E | E | E | E | E | E | E |
   Cterminus R-S-E-V R-S-E-V R-S-E-V R-S-E-V | R-S-E-V | R-S-E-V | R-S-E-V | R-S-E-V |