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Characterization of the Subunit Structure of the Ribonucleic Acid Genome of Influenza Virus

Ribonucleic acid extracted from influenza virus was labeled at the 3′ termini with 3H and analyzed by polyacrylamide gel electrophoresis. Influenza virus was found to contain a minimum of seven and possibly as many as 10 polynucleotide chains, most of which appear to terminate at the 3′ end in uridine.