Table 1. Mutation loci from Ann-ca.
| Ts site | Wt A/PR8 | Ann-ca | Ts phenotype | Att phenotype |
| PB1 : 391 | K | E | + | + |
| 581 | E | G | + | + |
| 661 | A | T | -- | -- |
| PB2:265 | N | S | -- | -- |
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