Abstract:An in vitro RNA synthesis system was established in which the influenza virus virion (minus-sense) RNA was made from the synthetic plus-sense RNA (cRNA) template by the purified viral polymerase complex. The cRNA promoter was studied by mutational analysis using the in vitro system, and on the basis of these experiments, the first 11 nucleotides of the 3' noncoding sequence were found to contain the minimum promoter required for virion RNA synthesis. The addition of extra nucleotides at the 3' end decreased th… Show more
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