Structure of the neuraminidase gene in human influenza virus A/PR/8/34

The complete structure of the neuraminidase gene in influenza A/PR/8/34 has been determined by cloning into the bacteriophage M13 and sequencing with dideoxynucleotide chain terminators. The gene is 1,413 nucleotides long, codes for a protein of 454 amino acids and has five potential glycosylation sites. We suggest that the neuraminidase, unlike the influenza haemagglutinin, is oriented with its N-terminus buried in the viral membrane.