Results 11 to 20 of about 452,870 (322)
The physics of chromatin [PDF]
arXiv, 2003 Recent progress has been made in the understanding of the physical properties of chromatin -- the dense complex of DNA and histone proteins that occupies the nuclei of plant and animal cells. Here I will focus on the two lowest levels of the hierarchy of DNA folding into the chromatin complex: (i) the nucleosome, the chromatin repeating unit consisting
Everaers, R., Schiessel, H.
arxiv +8 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 +3 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
Bio-Protocol, 2021 β-hemoglobinopathies are severe genetic disorders characterized either by the abnormal synthesis of the adult β-globin chains of the hemoglobin (Hb) tetramer (βS-globin chains) in sickle cell disease (SCD) or by the reduced β-globin production in β ...
Anne Chalumeau +3 more
doaj +1 more source
Heterogeneous interactions and polymer entropy decide organization and dynamics of chromatin domains [PDF]
Biophysical Journal, 121, 2794-2812, 2022, 2021 Chromatin is known to be organized into multiple domains of varying sizes and compaction. While these domains are often imagined as static structures, they are highly dynamic and show cell-to-cell variability. Since processes such as gene regulation and DNA replication occur in the context of these domains, it is important to understand their ...
arxiv +1 more source