Pathogenicity and Amino Acid Sequences of Hemagglutinin Cleavage Site and Neuraminidase Stalk of Differently Passaged H9n2-Avian Influenza Virus in Broilers
Advances in Bioscience and Biotechnology
doi 10.4236/abb.2011.24030
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Date
January 1, 2011
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Scientific Research Publishing, Inc.