No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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Aspartic Acid / analysis
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Hemagglutinins, Viral / analysis*
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Horses
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Influenza A virus / immunology*
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RNA Viruses / immunology*
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Recombination, Genetic
Substances
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Hemagglutinins, Viral
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Aspartic Acid