[Electrophoretic motility of RNA of recombinant influenza virus strains X-7 and X-9].

The electrophoretic motilitiy of RNA of recombinant influenza virus strains X-7 and X-9 differing in the antigenic structure of hemagglutinin and neuraminidase was studied. The genome of these viruses was found to be fragmentary and to consist of 7 RNA molecules. Significant differences in the electrophoretic motility of the middle-molecular RNA compounds of influenza X-7 and X-9 virus were demonstrated, particularly of the V fragment the molecular weight of which was lower in influenza X-9 virus.