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Human MxA protein was analyzed for its ability to inhibit the replication of different influenza C viruses. Three laboratory derivatives of viral strain C/Ann Arbor/1/50 were investigated, namely the parental wild-type virus C/AA-wt, the persistent variant C/AA-pi and the highly cytopathogenic variant C/AA-cyt. In addition, strain C/Paris/214/91 isolated from an influenza patient was used. Multiplication...
The open reading frame (ORF) and the regulated synthesis of the influenza C viral NS1 protein were analyzed in view of viruses possessing different biological activities. We provide evidence for a 246-amino-acid NS1-ORF, encoded by five viral strains and variants. Prokaryotic expression of the prototype NS1-ORF resulted in a product of 27 kDa, confirming the predicted molecular weight. Using an antiserum...
Two influenza C viruses were used for double-infection experiments to investigate the dominance of their phenotypes. The wild-type virus (C/AA-wt) had been characterized by its short-lived productive cycle, whereas a distinct variant derived from it (C/AA-pi) was demonstrated to persist in long-term passages of infected MDCK cultures. Here we show that the persistent virus C/AA-pi is capable of replicating...
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