Nucleotide sequence of the influenza virus A/USSR/90/77 neuraminidase gene

The complete nucleotide sequence of the N1 neuraminidase gene of influenza virus A/USSR/90/77 was determined. Comparison of its predicted amino acid sequence with other N1 and N2 neuraminidases indicates that the N1 neuraminidases share most of the antigenic determinants mapped on the N2 neuraminidase but display at least one additional potentially antigenic region probably as a result of intersubtypic differences in glycosylation.