FIG. 1.
Sequence of the NP gene segment coding region of the 1918 strain. The coding sequence begins at nucleotide 46. The NP theoretical translation is shown above the sequence. The PIRs are boxed; within the PIRs, the PIPs are marked with asterisks. The numbering of the gene segment is aligned to that of A/WS/33 (GenBank accession number M30746).