[Primary structure of the hemagglutinin gene in strains of the influenza virus A/Leningrad/624/86 and A/Leningrad/621/86 serologic subtype H1N1]. / Pervichnaia struktura gena gemaggliutinina shtammov virusa grippa A/Leningrad/624/86 i A/Leningrad/621/86 seropodtipa H1N1.

A molecular analysis was made of genomes of influenza A (H1N1) virus strains, the causative agents of an epidemic in Leningrad, 1986. The primary structure of hemagglutinin gene of two of these strains, A/Leningrad/624/86 and A/Leningrad/621/86, was established, as well as partial primary structure of PB1 gene of certain current strains of the A (H1N1) subtype. A hypothesis of a "shift" of PB1 gene in 1950-1957 is suggested.