| No | A/H3N2/Texas/2012 strain | A/H3N2/Switzerland/2013 strain | Position |
| 1 | Asparagine (N) | Alanine (A) | 128 |
| 2 | Alanine (A) | Serine (S) | 138 |
| 3 | Isoleucine (I) | Arginine (R) | 140 |
| 4 | Arginine (R) | Glycine (G) | 142 |
| 5 | Asparagine (N) | Serine (S) | 145 |
| 6 | Phenylalanine (F) | Serine (S) | 159 |
| 7 | Glycine (G) | Valine (V) | 186 |
| 8 | Proline (P) | Serine (S) | 198 |
| 9 | Serine (S) | Phenylalanine (F) | 219 |
| 10 | Asparagine (N) | Aspartate (D) | 225 |
| 11* | Lysine (K) | Arginine (R) | 326 |
| *not shown in the crystal structure in Figure 8, because the hemagglutinin was cutted at residue 325. |
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