Summary
cDNA clones of the neuraminidase gene from the reassortant influenza virus X-7 (F1) have different sequences. Some clones are more closely related to A/Tokyo/67 neuraminidase than to the A/RI/5+/57 NA gene from which the NA of X-7 (F1) was derived.
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References
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Ritchie, L.R., Webster, R.G., Laver, W.G. et al. Heterogeneity of neuraminidase genetic information in an H1N2 reassortant influenza virus [X-7 (F1)]. Archives of Virology 96, 303–308 (1987). https://doi.org/10.1007/BF01320972
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DOI: https://doi.org/10.1007/BF01320972