Results 1 to 10 of about 8,314 (141)
Hoya pyrifolia (Apocynaceae), a new species from south-western Yunnan, China [PDF]
PhytoKeys, 2021 Hoya pyrifolia, a new species of Apocynaceae from Yunnan Province, China, is described and illustrated. Results from phylogenetic analyses, based on combined DNA fragments of the nuclear ribosomal external transcribed spacer (ETS), intergeneric ...
Er-Feng Huang +6 more
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Structure of the intergenic spacers in chicken ribosomal DNA [PDF]
Genetics Selection Evolution, 2019 Abstract Background Ribosomal DNA (rDNA) repeats are situated in the nucleolus organizer regions (NOR) of chromosomes and transcribed into rRNA for ribosome biogenesis. Thus, they are an essential component of eukaryotic genomes.
Alexander Dyomin +10 more
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Transcriptional role for the nontranscribed spacer of rat ribosomal DNA. [PDF]
Molecular and Cellular Biology, 1986 In vitro transcription of the rat rRNA gene led to the identification of a region within a 3.4-kilobase fragment of the nontranscribed spacer (NTS) which significantly increased the transcription of rat ribosomal DNA. Promoter constructs containing this region were transcribed up to 17-fold more efficiently in vitro than templates with only 167 or 286 ...
Brandt Cassidy +2 more
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Elatostema qinzhouense (Urticaceae), a new species from limestone karst in Guangxi, China [PDF]
PeerJ, 2021 Elatostema qinzhouense L.F. Fu, A.K. Monro & Y.G. Wei, a new species from Guangxi, China is described and illustrated. Morphologically, E. qinzhouense is most similar to E.
Longfei Fu +7 more
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Organization of the bacterial nucleoid by DNA-bridging proteins and globular crowders [PDF]
Frontiers in Microbiology, 2023, 14, 2023 The genomic DNA of bacteria occupies only a fraction of the cell called the nucleoid, although it is not bounded by any membrane and would occupy a volume hundreds of times larger than the cell in the absence of constraints. The two most important contributions to the compaction of the DNA coil are the cross-linking of the DNA by nucleoid proteins ...
arxiv +1 more source
Transcription in cloned spacers of Xenopus laevis ribosomal DNA. [PDF]
Proceedings of the National Academy of Sciences, 1983 Rare individuals of Xenopus laevis exhibit frequent initiation of transcription in the spacers of oocyte ribosomal DNA (rDNA). Using electron microscopy we have characterized spacer transcription in such an individual and have confirmed that the sites of transcription initiation correspond to the imperfectly duplicated promoters ("Bam islands") present
Ronald H. Reeder +2 more
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Hayati Journal of Biosciences, 2012 Tempe fermentation involved complex microbial communities which are only revealed partially through culture dependent methods. Culture-independent methods would be potential to unravel this complex microbial fermentation. Appropriate DNA extraction is an
CECILIA ANNA SEUMAHU +3 more
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Heterologous autoimmunity and prokaryotic immune defense [PDF]
Current Biology 2022, 2021 Some prokaryotes possess CRISPR-Cas systems that provide adaptive immunity to viruses guided by DNA segments called spacers acquired from invading phage. However, the patchy incidence and limited memory breadth of CRISPR-Cas systems suggest that their fitness benefits are offset by costs.
arxiv +1 more source
Functional analysis of transcribed spacers of yeast ribosomal DNA. [PDF]
The EMBO Journal, 1990 Making use of an rDNA unit, containing oligonucleotide tags in both the 17S and 26S rRNA gene, we have analyzed the effect of various deletions in the External Transcribed Spacer (ETS) and in one of the Internal Transcribed Spacers 1 (ITS1) on the process of ribosome formation in yeast.
K. Boon +4 more
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Ribosomal DNA (rDNA) spacer polymorphism in mole rats. [PDF]
Molecular Biology and Evolution, 1987 Genetic differentiation of ribosomal DNA (rDNA) nontranscribed-spacer (NTS) polymorphism was analyzed in 50 individuals from 13 populations among the four chromosomal species (2n = 52, 2n = 54, 2n = 58, and 2n = 60) of subterranean mole rats of the Spalax ehrenbergi complex in Israel.
Eviatar Nevo, K Moriwaki, Hitoshi Suzuki
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