Results 161 to 170 of about 96,602 (197)
Two 5S rDNA arrays in Neotropical fish species: is it a general rule for fishes?
Genetica, 2001 In this paper we describe Southern blot hybridization results probed with 5S rRNA genes for several Neotropical fish species representing different taxonomic groups. All the studied species showed a general trend with the 5S rDNA tandem repeats organized
Pedro Manoel Galetti +2 more
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Plant 5S rDNA has multiple alternative nucleosome positions
Genome, 2006In plants, 5S ribosomal DNA (5S rDNA) is typically found in hundreds of copies of tandemly arranged units. Nucleotide database searches revealed that the majority of 5S genes (>90%) have repeat lengths that are not simple multiples of a plant nucleosomal unit, ranging in plants from 175–185 bp.
Jaroslav, Fulnecek +2 more
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High Evolutionary Dynamism in 5S rDNA of Fish: State of the Art
Cytogenetic and Genome Research, 2013The 5S ribosomal DNA (rDNA) consists of one transcriptional unit of about 120 base pairs, which is separated from the next unit by a non-transcribed spacer (NTS). The coding sequence and the NTS together form a repeat unit which can be found in hundreds to thousands of copies tandemly repeated in the genomes. The NTS regions seem to be subject to rapid
L, Rebordinos, I, Cross, A, Merlo
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Length and sequence heterogeneity in 5S rDNA ofPopulus deltoides
Genome, 2002The 5S rRNA genes and their associated non-transcribed spacer (NTS) regions are present as repeat units arranged in tandem arrays in plant genomes. Length heterogeneity in 5S rDNA repeats was previously identified in Populus deltoides and was also observed in the present study.
Madan S, Negi +4 more
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[Physical mapping of the 45S rDNA and 5S rDNA to rice prometaphase chromosome].
Yi chuan xue bao = Acta genetica Sinica, 2002Rice (Oryza sativa L.) is one of the most important cereal crops in the world. The chromosomes of rice are relatively small in size. With the help of fluorescence in situ hybridization (FISH), several rice DNAs have been localized on rice chromosomes. 45S rDNA and 5S rDNA are encoding sequences for ribosomal RNA synthesis. For detecting the chromosomes
Zhi-Yun, Gong +3 more
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Analysis of 5S rDNA changes in synthetic allopolyploids Triticum × Aegilops
Molecular Biology, 2008By the example of three synthetic allopolyploids: Aegilops sharonensis x Ae. umbellulata (2n =28), Triticum urartu x Ae. tauschii (2n =28), T. dicoccoides x Ae. tauschii (2n =42) the 5S rDNA changes at the early stage of allopolyploidization were investigated.
A B, Shcherban' +3 more
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Phylogeny of Eucalyptus and Angophora Based on 5S rDNA Spacer Sequence Data
Molecular Phylogenetics and Evolution, 1995Sequences of the 5S rDNA repeat have been determined from four outgroup taxa (Arillastrum group), 2 Angophora species, and 19 Eucalyptus species (including representatives from all informal subgenera). Alignment shows that, as in other plants, the tandemly repeated 5S rRNA genes are highly conserved while the noncoding intergenic spacers are variable ...
F, Udovicic, G I, McFadden, P Y, Ladiges
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Marine Genomics, 2011
Polypteridae is a family of archaic freshwater African fish that constitute an interesting subject for the study of the karyological evolution in vertebrates, on account of their primitive morphological characters and peculiar relationships with lower Osteichthyans.
M. A. Morescalchi +2 more
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Polypteridae is a family of archaic freshwater African fish that constitute an interesting subject for the study of the karyological evolution in vertebrates, on account of their primitive morphological characters and peculiar relationships with lower Osteichthyans.
M. A. Morescalchi +2 more
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Journal of Molecular Evolution, 2009
The molecular organization of the 5S rRNA gene family has been studied in a wide variety of animal taxa, including many bony fish species. It is arranged in tandemly repeated units consisting of a highly conserved 120 base pair-long region, which encodes for the 5S rRNA, and a nontranscribed spacer (NTS) of variable length, which contains regulatory ...
Daniel, Campo +3 more
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The molecular organization of the 5S rRNA gene family has been studied in a wide variety of animal taxa, including many bony fish species. It is arranged in tandemly repeated units consisting of a highly conserved 120 base pair-long region, which encodes for the 5S rRNA, and a nontranscribed spacer (NTS) of variable length, which contains regulatory ...
Daniel, Campo +3 more
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Distribution of 45S and 5S rDNA sites in 23 species of Eleocharis (Cyperaceae)
Genetica, 2010Studies of rDNA location in holocentric chromosomes of the Cyperaceae are scarce, but a few reports have indicated the occurrence of multiple 45S rDNA sites at terminal positions, and in the decondensed state of these regions in prometaphase/metaphase.
Maximiano da Silva, Carlos Roberto +2 more
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