TABLE 2.
HA variability among European avian-like swine influenza viruses
| Strain | Amino acid position in the HA1a
|
|||||||
|---|---|---|---|---|---|---|---|---|
| 96 | 121 | 132 | 138 | 142 | 207 | 267 | 311 | |
| Sw/Arnsberg/6554/79b | I | N | V | Y | S | N | T | K |
| Sw/Netherlands/3/80c | I | N | V | Y | S | N | T | K |
| Sw/Germany/2/81b | I | N | V | Y | H | N | T | K |
| Sw/Belgium/1/83c | I | N | I | Y | R | N | T | K |
| Sw/Netherlands/12/85c | I | N | I | Y | L | N | T | K |
| Sw/Italy-Vir/671/87c | A | T | A | H | L | Y | M | Q |
| Sw/Germany/3/91b | A | T | V | H | L | Y | M | Q |
| Sw/Schleswig-Holstein/1/92b | A | T | A | H | L | Y | M | Q |
a
Only those positions in the HA1 at which more than three strains contain an amino acid change are shown.
b
Based on nucleotide sequence obtained from GenBank.
c
Determined as described in Materials and Methods.