Results 301 to 310 of about 2,640,580 (326)
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Chromatin states at ribosomal DNA loci
Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms, 2013Eukaryotic transcription of ribosomal RNAs (rRNAs) by RNA polymerase I can account for more than half of the total cellular transcripts depending on organism and growth condition. To support this level of expression, eukaryotic rRNA genes are present in multiple copies.
Stephan, Hamperl +5 more
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1988
The nucleolus organizer region (NOR) of maize chromosome 6 is now known to be the location of the 17/5.8/26S rDNA (hereafter termed 17/26S rDNA); this molecular information extends the NOR function to one of synthesizer as well as organizer. The extensive variation in ribosomal DNA (rDNA) multiplicity and the finding that much of the rDNA is in the NOR-
R. L. Phillips +3 more
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The nucleolus organizer region (NOR) of maize chromosome 6 is now known to be the location of the 17/5.8/26S rDNA (hereafter termed 17/26S rDNA); this molecular information extends the NOR function to one of synthesizer as well as organizer. The extensive variation in ribosomal DNA (rDNA) multiplicity and the finding that much of the rDNA is in the NOR-
R. L. Phillips +3 more
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Replicon size of yeast ribosomal DNA
Molecular and General Genetics MGG, 1984The ribosomal RNAs of the yeast Saccharomyces cerevisiae are transcribed from a 9K bp stretch of DNA which is reiterated about 120-fold in a continuous array, about 360 microns long, on chromosome XII. Although ARS activity has been detected in the repeat unit, the size and disposition of replicons along this array of identical genes has not hitherto ...
Walmsley, Richard M. +3 more
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Journal of Molecular Biology, 1980
Abstract We have analysed the ribosomal DNA of Calliphora erythrocephala, a Dipteran fly of the same sub-order as Drosophila melanogaster, through a series of rDNA † fragments cloned in a plasmid vector. We have mapped the sites for eight restriction enzymes within these plasmids, and positioned the regions coding for the 18 S and 28 S rRNAs within ...
K, Beckingham, R, White
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Abstract We have analysed the ribosomal DNA of Calliphora erythrocephala, a Dipteran fly of the same sub-order as Drosophila melanogaster, through a series of rDNA † fragments cloned in a plasmid vector. We have mapped the sites for eight restriction enzymes within these plasmids, and positioned the regions coding for the 18 S and 28 S rRNAs within ...
K, Beckingham, R, White
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Ribosome cycle emerges from DNA replication
Nature Reviews Molecular Cell Biology, 2017A modification of Meselson and Stahl's density gradient centrifugation method and a rare Texan yeast helped show that eukaryotic ribosomes dissociate and reform during translation.
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The evolution of eukaryotic ribosomal DNA
Biosystems, 1986Mutations occur randomly throughout the ribosomal DNA (rDNA) sequence. Molecular drive (unequal crossing-over, gene conversion, and transposition) spreads these variations through the multiple copies of rDNA. Forces of selection act upon the variants to favor and fix them or disfavor and eliminate them.
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Heterogeneity in Chinese hamster ribosomal DNA
Chromosoma, 1978A discrete heterogeneity has been detected in Chinese hamster ribosomal DNA after Eco R1 digestion of total DNA followed by a Southern transfer and hybridization with [125I]18S or [125I]28S ribosomal RNA. Digestion with Eco R1 produces three fragments, 4.3, 6.0 and 9.5 x 10(6) daltons respectively, which hybridize with 18S RNA.
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Regulation of ribosomal RNA gene copy number, transcription and nucleolus organization in eukaryotes
Nature reviews. Molecular cell biology, 2023Yutaro Hori +2 more
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Ribosomal DNA and the nucleolus in the context of genome organization
Chromosome Research, 2019T. Potapova, J. Gerton
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