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. 1984 May;50(2):497–506. doi: 10.1128/jvi.50.2.497-506.1984

Mapping of Early and Late Transcripts Encoded by the Autographa californica Nuclear Polyhedrosis Virus Genome: Is Viral RNA Spliced?

Hermann Lübbert 1, Walter Doerfler 1,*
PMCID: PMC255656  PMID: 16789249

Abstract

Early and late transcripts were mapped on the Autographa californica nuclear polyhedrosis virus genome by Northern blotting and hybridization with the cloned viral EcoRI fragments. At least 11 early and about 90 late RNAs were compared with over 32 polypeptides synthesized by in vitro translation of hybrid-selected RNA. The latter method, of course, had its limitations also and did not guarantee that all viral RNAs could be detected in this way. A comparison of cytoplasmic and total cellular RNAs showed no clear-cut differences in their size distributions. We found that there were more RNA classes than corresponding proteins encoded by them and mapped by in vitro translation. By using the Berk-Sharp method and analyses of DNA-RNA hybrids by one-dimensional or two-dimensional neutral and alkaline gel electrophoreses, we were unable to adduce evidence for RNA splicing in this viral system. Minor splices, particularly at sites close to the termini of RNA molecules, could not be excluded.

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