title: [Activity of virion RNA-polymerase in influenza A and B virus variants with different pathogenicities for mice].
abstract: RNA polymerase activities in parental strains of influenza A and B viruses nonpathogenic for mice and their pathogenic variants have been studied. The parental strains are A/seal/Massachusetts 1/80, A/USSR 05/81, A/Philippines 2/82, B/Singapore 222/79. The RNA polymerase activity has been also studied in recombinant strains obtained by crossing various parental strains, one of which is pathogenic for mice (AR/PR 8/34), and having different degrees of pathogenicity. The nonpathogenic viruses had low transcriptase activity. RNA polymerase activity in pathogenic variants is shown to be 1.5-3 times higher than that in the parental strains. All the recombinants, whatever their pathogenicity, had approximately the same transcriptase activities which were 1.5-2 times higher than those registered in parental nonpathogenic strains.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism*; D009980:Influenza A virus / Q000201:enzymology* / Q000472:pathogenicity; D009981:Influenza B virus / Q000201:enzymology* / Q000472:pathogenicity; D007700:Kinetics; D051379:Mice; D014771:Virion / Q000201:enzymology*
chemical_list: D012321:DNA-Directed RNA Polymerases
vernacular_title: Aktivnost' virionnoĭ RNK-polimerazy u variantov virusa grippa A i B, razlichaiushchikhsia po priznaku patogennosti dlia mysheĭ.