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  • Title: Functional and structural analysis of the ribonucleoprotein complexes of different human influenza virus strains.
    Author: Schreier E, Schweiger B, Stompor S, Stompor B, Schulze P, Michel S.
    Journal: Acta Virol; 1988 Jul; 32(4):289-95. PubMed ID: 2903632.
    Abstract:
    Ribonucleoprotein (RNP) cores were prepared from various strains of human influenza virus by treating the purified or spikeless virus particles with non-ionic detergents such as Nonidet P-40 and centrifugation in continuous linear glycerol gradients. In addition to RNA, the purified complexes contained viral nucleoprotein (NP) and the three P proteins (PA, PB1, PB2) as determined by polyacrylamide gel electrophoresis (PAGE) under denaturing conditions. Contaminations with other viral polypeptides, especially HA1, HA2 and M were below 1%. All RNP complexes were transcriptionally active in vitro. Comparison of the polymerase activity of purified complexes revealed considerable differences depending not only on the content of polymerase proteins. The activity of RNP complexes was enhanced for all strains tested by adding of ApG.
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