Results 11 to 20 of about 971,786 (390)
Cytoplasmic chromatin triggers inflammation in senescence and cancer [PDF]
Nature, 2017 Chromatin is traditionally viewed as a nuclear entity that regulates gene expression and silencing. However, we recently discovered the presence of cytoplasmic chromatin fragments that pinch off from intact nuclei of primary cells during senescence, a ...
Zhixun Dou +23 more
semanticscholar +4 more sources
Journal of Medical Genetics, 1964 Publisher Summary The term “sex chromatin,― denotes a body in the nuclei of cells, which shows a special relationship to the sex of the organism from which the cell originated. The sex-chromatin body is present in the nucleus only during interphase and disappears during mitosis.
Ursula Mittwoch
openalex +5 more sources
Current Biology, 2015 Chromatin is a complex of proteins, RNA and DNA that constitutes the physiological state of the genome. Its basic structure is essentially the same in nearly all eukaryotes, from single-celled yeasts to the most complex multicellular organisms (exceptions include the chromatin of dinoflagellates and vertebrate sperm). Its fundamental role is to package
Gross, David S. +3 more
openaire +3 more sources
Chromatin Boundaries and Chromatin Domains [PDF]
Cold Spring Harbor Symposia on Quantitative Biology, 2004 Insulator elements were first described in Drosophila, but subsequent studies have shown that they are present in vertebrates as well (for review, see West et al. 2002). Over the past several years we have focused our attention on the properties of an insulator at the 5énd of the chicken β-globin locus that has begun to provide an understanding of how ...
Felsenfeld, G. +13 more
openaire +3 more sources
Chromatin Loop Extrusion and Chromatin Unknotting [PDF]
Polymers, 2018 It has been a puzzle how decondensed interphase chromosomes remain essentially unknotted. The natural expectation is that in the presence of type II DNA topoisomerases that permit passages of double-stranded DNA regions through each other, all chromosomes should reach the state of topological equilibrium.
Racko, Dusan +3 more
openaire +4 more sources
Chromatin Unlimited: An Evolutionary View of Chromatin [PDF]
Epigenomes, 2022 Chromatin is a fundamental and highly conserved structure that carries genetic and epigenetic information in eukaryotic cells [...]
openaire +3 more sources
Biophysical Journal, 2014 Following recent observations of large scale correlated motion of chromatin inside the nuclei of live differentiated cells, we present a hydrodynamic theory-the two-fluid model-in which the content of a nucleus is described as a chromatin solution with the nucleoplasm playing the role of the solvent and the chromatin fiber that of a solute. This system
Bruinsma, Robijn +3 more
openaire +4 more sources
Journal of Theoretical Biology, 1996 Cellular and molecular biological approaches that study eukaryotic gene regulation have led to separate models which describe structure and mechanism with differing precision. Using principles of combinatorial and cooperative interactions inherent in both models, we have extended concepts derived from a "genetic switch" for prokaryotes to a chromatin ...
Bodnar, John W., Bradley, Margaret K.
openaire +4 more sources
Structural basis of RNA polymerase II transcription on the chromatosome containing linker histone H1
Nature Communications, 2022 The mechanism by which RNAPII transcribes the DNA in the chromatosome with H1 has remained enigmatic. Here the authors present the cryo-EM structures of the RNAPII-chromatosome complexes, and explain how RNAPII is regulated by H1 in chromatin.
Rina Hirano +6 more
doaj +1 more source
Histochemistry and Cell Biology, 2018 The nucleolus as site of ribosome biogenesis holds a pivotal role in cell metabolism. It is composed of ribosomal DNA (rDNA), which is present as tandem arrays located in nucleolus organizer regions (NORs). In interphase cells, rDNA can be found inside and adjacent to nucleoli and the location is indicative for transcriptional activity of ribosomal ...
Christian Schöfer, Klara Weipoltshammer
openaire +2 more sources