1887

Abstract

Using an SI mapping assay on RNA from cells infected by the nuclear polyhedrosis virus in the presence and absence of cycloheximide and aphidicolin, we can distinguish three classes of transcripts. First, there are those whose synthesis is blocked by the DNA synthesis inhibitor aphidicolin and which are therefore late transcripts. These include the late transcript of the 39K gene and a late leftward transcript across the I site in the dIII-F region. Second, there are those whose synthesis is not blocked by aphidicolin, but whose accumulation is inhibited by the protein synthesis inhibitor cycloheximide and which are therefore presumably delayed early genes. These include the p26 transcript(s), the early 39K transcript and the a transcript in the dIII-K/Q region. Third, there are those whose accumulation is not affected or is enhanced by cycloheximide. These are not necessarily immediate early transcripts, but their response to cycloheximide is clearly different from that of those in the second class. They include the α, and α transcripts in the dIII-K/Q region and the early leftward transcript across the I site in the dIII-F region.

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1990-09-01
2021-10-25
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