Results 41 to 50 of about 287,665 (235)

Evaluation of COI and ITS2 sequences ability to distinguish Lysiphlebus fabarum and Lysiphlebus confusus (Hymenoptera: Aphidiidae) [PDF]

open access: yesنامه انجمن حشره‌شناسی ایران, 2012
All wasp species in the genus Lysiphlebus Förster are solitary endoparasitoids of aphids andconsidered a taxonomically difficult group. In this study a part of COI and ITS2 was used to distinguishtwo closely related species L.
M. M. Sohani   +3 more
doaj  

Roles of ribosomal proteins in hematologic disorders and cancers: a review

open access: yesEmergency and Critical Care Medicine, 2023
. Ribosomes are important organelles for synthesizing proteins in cells. They are composed of ribosomal RNA and more than 80 ribosomal proteins. It is well known that an essential function of ribosomal proteins is to participate in protein translation ...
Jie Wang, Feng Yan
doaj   +1 more source

Fluorescent in situ hybridization of the ribosomal RNA genes (5S and 35S) in the genus Lolium: Lolium canariense, the missing link with Festuca?

open access: yesAnales del Jardín Botánico de Madrid, 2013
Two groups of taxa can be distinguished within the genus Lolium L. based on the pollination system, chromosome size, chromosomal location of nrDNA (5S and 35S (18S-5.8S-26S)] and nrDNA phylogeny.
Luis A. Inda, Elzbieta Wolny
doaj   +1 more source

Quantitation of Human Ribosomal DNA: Hybridization of Human DNA with Ribosomal RNA for Quantitation and Fractionation [PDF]

open access: yesPediatric Research, 1973
Extract: Quantitation of human genes for ribosomal RNA (rRNA) was possible by molecular DNA/RNA hybridization on nitrocellulose discs. Labeled ribosomal RNA hybridizes with an average of 14 × 10-5 of the total human DNA. If we assume that the diploid cell contains 5.5 × 1012 daltons of DNA, the ribosomal RNA hybridizes with 7.7 × 108 daltons of ...
openaire   +3 more sources

Mild cognitive impairment is associated with low copy number of ribosomal genes in the genomes of elderly people

open access: yesFrontiers in Genetics, 2022
Introduction: Mild cognitive impairments (MCI) accompanying aging are associated with oxidative stress. The ability of cells to respond to stress is determined by the protein synthesis level, which depends on the ribosomes number.
Natalia N. Veiko   +11 more
doaj   +1 more source

Modular Golden Gate Assembly of Linear DNA Templates for Cell-free Prototyping [PDF]

open access: yesarXiv, 2023
Cell-free transcription and translation (TXTL) systems have emerged as a powerful tool for testing genetic regulatory elements and circuits. Cell-free prototyping can dramatically accelerate the design-build-test cycle of new functions in synthetic biology, in particular when linear DNA templates are used.
arxiv  

First Report of Hemicriconemoides kanayaensis (Nematoda: Criconematidae) on Tea Plantations in Iran

open access: yesJournal of Nematology
During a nematode survey in Iran, an abundant population of sheathoid, migratory, root-ectoparasitic nematodes was recovered from a tea, Camellia sinensis (L.), Kuntze plantation for the first time. Morphological and molecular characterization identified
Mirghasemi Negin   +5 more
doaj   +1 more source

The Epigenetic Pathways to Ribosomal DNA Silencing [PDF]

open access: yesMicrobiology and Molecular Biology Reviews, 2016
SUMMARY Heterochromatin is the transcriptionally repressed portion of eukaryotic chromatin that maintains a condensed appearance throughout the cell cycle. At sites of ribosomal DNA (rDNA) heterochromatin, epigenetic states contribute to gene silencing and genome stability, which are required for proper chromosome segregation and
Rakesh Srivastava   +2 more
openaire   +3 more sources

Studies on ribosomal DNA in cetaceans (whales) [PDF]

open access: yesHereditas, 2008
ARNASON U. and WIDEGREN, B. 1984. Studies on ribosomal DNA in cetaceans (whales).—Hereditas 101:149–154. Lund, Sweden. ISSN 0018–0661. Ribosomal DNA (rDNA) of 4 mysticetes and 10 odontocetes were studied by Southern blot hybridization. The material represented all extant cetacean families except the gray whales.
Bengt Widegren, Ulfur Arnason
openaire   +3 more sources

Molecular and ultrastructure characterization of two nematodes (Thelandros scleratus and Physalopteroides dactyluris) based on ribosomal and mitochondrial DNA sequences

open access: yesHelminthologia, 2016
The phylogenetic relationships of the nematode species Thelandros scleratus (Oxyurida: Pharyn-godonidae) and Physalopteroides dactyluris (Spirurida: Physalopteridae) were analyzed using the ribosomal 18S rRNAand the mitochondrial cytochrome C oxidase ...
Goswami U   +3 more
doaj   +1 more source

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