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Similarity analysis of HA nucleotide sequence and deduced amino acid sequence of H9N2 AIVs and vaccine strains.
| Virus | Nucleotide sequence | Amino acid sequence | |
|---|---|---|---|
| Vaccine strains | 35 H9N2 AIVs in this study | 84.0–100.0% | 89.1–100.0% |
| A/chicken/Guangdong/SS/1994 | 86.2–92.1% | 83.6–87.5% | |
| A/chicken/Shandong/6/1996 | 84.5–91.4% | 86.7–89.2% | |
| A/chicken/Shanghai/F/1998 | 84.0–93.0% | 87.7–92.2% |
