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In addition to the RI (replicative intermediate RNA) and native RF (replicative form RNA), mouse hepatitis virus-infected cells contained six species of RNA intermediates active in transcribing subgenomic mRNA. We have named these transcriptive intermediates (TIs) and native transcriptive forms (TFs) because they are not replicating genome-sized RNA. Based(More)
It has been reported that the avian-origin influenza A virus PB1 protein (avian PB1) enhances influenza A virus polymerase activity in mammalian cells when it replaces the human-origin PB1 protein (human PB1). Characterization of the amino acid residues that contribute to this enhancement is needed. In this study, it was found that PB1 from an avian-origin(More)
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