Results 101 to 110 of about 10,709 (124)
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Ribosomal DNA of Caenorhabditis elegans
Journal of Molecular Biology, 1981Abstract We have characterized the organization of the genes coding for 18 S, 5·8 S and 26 S ribosomal RNAs in the nematode Caenorhabditis elegans . These ribosomal genes, present in about 55 copies per haploid genome, alternate in a repeating tandem array.
David Hirsh, James G. Files
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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 ...
Kathy Beckingham, Ray 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 ...
Kathy Beckingham, Ray White
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Ribosomal DNA polymorphism in the genus Bifidobacterium
Research in Microbiology, 1996Ribosomal DNA polymorphism was studied in order to demonstrate intra- and interspecies differentiation of 42 Bifidobacterium strains. DNA from these strains was digested with the endonucleases BamHI, EcoRV, HindIII and PvuII and then analysed by Southern blotting. Ribosomal patterns using a part of an rRNA 23S gene as a probe clearly differentiated the
Mangin, I, Bourget, N, Decaris, B
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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-
Irwin Rubenstein +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-
Irwin Rubenstein +3 more
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Beyond ribosomal DNA: on towards the telomere
Chromosoma, 1997We have sequenced and analyzed 8.3 kb of sequence adjacent and distal to the human ribosomal DNA (rDNA); this distal sequence connects to the rDNA cluster just 4 kb upstream of the first promoter and is shared among the acrocentric chromosomes and, at least in part, it is also present in other primates.
Iris L. Gonzalez, James E. Sylvester
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The chromosomal location of ribosomal DNA in the mouse
Chromosoma, 1974In situ hybridization of I125-labelled ribosomal RNA to mouse chromosomes was used to determine the location of the rDNA loci. The results demonstrate the presence of rDNA sites on chromosomes 15, 18 and 19.
Henderson, A S +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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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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Ribosomal DNA and the Phylogeny of Frogs
Herpetological Monographs, 1993Phylogenetic analysis of 1656 aligned sites in the 28S ribosomal RNA gene of frogs supports some of the recently recognized higher groups of anurans but provides counter-support for others. The 28S rDNA data support the monophyly of the recently recognized Pipanura (me- sobatrachians plus neobatrachians), which in turn indicates paraphyly of ...
David M. Hillis +4 more
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Ribosomal DNA and Neurological Disorders
Current Molecular MedicineAbstract: Ribosomal DNA (rDNA) is important in the nucleolus and nuclear organization of human cells. Defective rDNA repeat maintenance has been reported to be closely associated with neurological disorders, such as Alzheimer’s disease, Huntington’s disease, Parkinson’s disease, amyotrophic lateral sclerosis, frontotemporal dementia, depression ...
Hong Zhou +6 more
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