Evidence that in higher plants the 25S and 18S rRNA genes are not interspersed with genes for 5S rRNA

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1978 English Publisher:Springer Science and Business Media LLCJournal:Chromosoma, volume 65, pages 353-358 (issn: 0009-5915, eissn: 1432-0886,

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Authors: Vera Hemleben; Donald Grierson;

doi: 10.1007/bf00286414

Evidence that in higher plants the 25S and 18S rRNA genes are not interspersed with genes for 5S rRNA

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Abstract

DNA samples from various higher plants (Phaseolus aureus, Glycine max, Matthiola incana, Brassica pekinensis, Cucumis melo) were centrifuged in actinomycin-caesium chloride gradients and the genes coding for the ribosomal RNAs were detected by hybridisation with tritium labelled 5S and 25S+18S rRNA, respectively. With DNA of low molecular weight ( 10×106 daltons) indicating that at least most of the 5S rRNA genes are not linked to, or interspersed with, the genes coding for 25S and 18S rRNA. This result is in agreement with the situation in animal cells and in contrast to that reported for bacteria, lower eukaryotes and chloroplasts.

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University of Tübingen
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