WebbAbstract Ribosomal repeats occupy 5% of a plant genome, yet there has been little study of their diversity in the modern age of genomics. Ribosomal copy number and expression … WebbNational Center for Biotechnology Information

The retrotransposon R2 maintains Drosophila ribosomal DNA …

WebbThe HMG box containing protein UBF binds to the promoter of vertebrate ribosomal repeats and is required for their transcription by RNA polymerase I in vitro. UBF can also bind in vitro to a variety of sequences found across the intergenic spacer in Xenopus and mammalian ribosomal DNA (rDNA) repeats. WebbBoth inverted repeats and direct repeats constitute types of nucleotide sequences that occur repetitively. These repeated DNA sequences often range from a pair of nucleotides to a whole gene, while the proximity of the repeat sequences varies between widely dispersed and simple tandem arrays. [3] lambda menu 2021

Horticulturae Free Full-Text Complete Chloroplast Genome …

The rRNA transcribed from the approximately 600 rDNA repeats forms the most abundant section of RNA found in cells of eukaryotes. Ribosomes are assemblies of proteins and rRNA molecules that translate mRNA molecules to produce proteins. As shown in the figure, rDNA of eukaryotes consists of a tandem … Visa mer Ribosomal DNA (rDNA) is a DNA sequence that codes for ribosomal RNA. These sequences regulate transcription initiation and amplification, and contain both transcribed and non-transcribed spacer segments. Visa mer In the large rDNA array, polymorphisms between rDNA repeat units are very low, indicating that rDNA tandem arrays are evolving through concerted evolution. However, the mechanism of concerted evolution is imperfect, such that polymorphisms … Visa mer A fragment of yeast rDNA containing the 5S gene, non-transcribed spacer DNA, and part of the 35S gene has localized cis-acting mitotic recombination stimulating activity. This DNA … Visa mer The rDNA transcription tracts have low rate of polymorphism among species, which allows interspecific comparison to elucidate phylogenetic relationship using only a few specimens. Coding regions of rDNA are highly conserved among species but ITS regions are … Visa mer Diseases can be associated with DNA mutations where DNA can be expanded, such as Huntington's disease, or lost due to deletion mutations. The same is true for mutations that occur … Visa mer WebbRibosomal RNA gene repeats (rDNA) encode ribosomal RNA, a major component of ribo-somes. Ribosome biogenesis is central to cellular metabolic regulation, and several dis-eases are associated with rDNA dysfunction, notably cancer, However, its highly repetitive nature has severely limited characterization of the elements responsible for rDNA ... WebbHighly Efficient Concerted Evolution in the Ribosomal DNA Repeats: Total rDNA Repeat Variation Revealed by Whole-Genome Shotgun Sequence Data Repeat families within genomes are often maintained with similar sequences. jerome carey