AN RNA „REPLICASE” INDUCED BY AND SELECTIVE FOR A VIRAL RNA: ISOLATION AND PROPERTIES

Abstract
An RNA polymerase has been isolated and purified from cells infected with an RNA virus. It shows a dependence on RNA for polymerizing activity and a mandatory requirement for all four riboside triphosphates when employing a template which contains all four bases. The enzyme exhibits a selective preference for its homologous RNA, being completely inactive with host s-RNA and ribosomal RNA. It is partially functional with certain other viral RNA''s.