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.
摘要本文研究了不同寄主来源H9N2禽流感病毒血凝素基因正选择压力，以及
较了这些病毒所受选择压力的差异。
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.
摘要本文研究了不同寄主来源H9N2禽流感病毒血凝素基因正选择压力，以及较了这些病毒所受选择压力的差异。
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