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Journal of Cell Science, Vol 40, Issue 1 181-192, Copyright © 1979 by Company of Biologists

JOURNAL ARTICLES

Non-nucleolar transcription complexes of rat liver as revealed by spreading isolated nuclei

F Harper and F Puvion-Dutilleul

Miller's technique was applied to isolated nuclei of rat liver. Both the usual nucleolar and non-nucleolar transcription complexes were visualized. In addition, an unusual type of putative non-ribosomal transcription unit was revealed. It was charcaterized by a high density of the lateral ribonucleoprotein (RNP) fibrils. Although these particular units exhibited a regular increase of fibril lengths, the length of the transcript-covered deoxyribonucleoprotein (DNP) fibres and the morphological aspect of the RNP fibrils distinguished them from the nucleolar 'Christmas-tree'-like figures. The linear and granular configuration of the transcripts and the absence of terminal knobs made them similar to non-nucleolar nascent RNP fibrils.


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© The Company of Biologists Ltd 1979