Mutations in NA That Induced Low pH-Stability and Enhanced the Replication of Pandemic (H1N1) 2009 Influenza A Virus at an Early Stage of the Pandemic

• Tadanobu Takahashi,

  Affiliations Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States of America, Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, and Global COE Program for Innovation in Human Health Sciences, Shizuoka, Japan

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• Jiasheng Song,

  Affiliation Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States of America

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• Takashi Suzuki ,

  * E-mail: suzukit@u-shizuoka-ken.ac.jp (TS); kawaokay@svm.vetmed.wisc.edu (YK)

  Affiliation Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka, and Global COE Program for Innovation in Human Health Sciences, Shizuoka, Japan

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• Yoshihiro Kawaoka

  * E-mail: suzukit@u-shizuoka-ken.ac.jp (TS); kawaokay@svm.vetmed.wisc.edu (YK)

  Affiliations Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, United States of America, Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo, Japan, ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama, Japan

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