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Selection pressure on Haemagglutinin genes of H9N2 influenza viruses from different hosts

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Virologica Sinica

Abstract

Positive selection and differential selective pressure analyses were carried out to study Haemagglutinin (HA) genes of H9N2 influenza viruses from different hosts in this paper. Results showed that, although most positions in HAs were under neutral or purifying evolution, a few positions located in the antigenic regions and receptor binding sites were subject to positive selection and some of them were even positively selected at the population level. In addition, there were always some positions differentially selected for viruses from different hosts. Both selection pressure working on HA codons and positions differentially selected might account for the extension of the host range and adaptations to different hosts of H9N2 influenza viruses.

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Authors and Affiliations

  1. Institute of Life Sciences, Taishan Medical College, Taian, 271000, China

    Wei-feng Shi

  2. Department of Basic Medicine, Taishan Medical College, Taian, 271000, China

    Ai-she Dun, Zhong Zhang, Guang-fu Yu & Dong-ming Zhuang

  3. Institute of Zoology, Chinese Academy of Sciences, Bei**g, 100101, China

    Yan-zhou Zhang & Chao-dong Zhu

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  1. Wei-feng Shi
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  2. Ai-she Dun
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  3. Zhong Zhang
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  4. Yan-zhou Zhang
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  5. Guang-fu Yu
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  6. Dong-ming Zhuang
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  7. Chao-dong Zhu
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Correspondence to Chao-dong Zhu.

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Shi, Wf., Dun, As., Zhang, Z. et al. Selection pressure on Haemagglutinin genes of H9N2 influenza viruses from different hosts. Virol. Sin. 24, 65–70 (2009). https://doi.org/10.1007/s12250-009-2988-5

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  • DOI: https://doi.org/10.1007/s12250-009-2988-5

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