Author affiliations: Author affiliations: The Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, China Agricultural University, Beijing, People’s Republic of China (J.L. Feng, Y.X. Hu, J.X. Zhao, G.Z. Zhang); Animal Husbandry and Veterinary Station of Beijing, Beijing (Z.J. Ma, Q. Yu, X.D. Liu)
Figure 2. . Amino acid sequence alignment for the S1 gene (A, B) and S2 gene (C) of 14 strains of avian infectious bronchitis virus. Strains YN, SC021202, A2, and SAIBK have a 7-aa insertion in the S1 gene and a 9-aa deletion in the S2 gene, compared with most strains.
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