Results 101 to 110 of about 45,751 (265)

Rumex acetosa Y chromosomes: constitutive or facultative heterochromatin?

Folia Histochemica et Cytobiologica, 2011
Condensed Y chromosomes in <i>Rumex acetosa</i> L. root-tip nuclei were studied using 5-azaC treatment and immunohistochemical detection of methylated histones. Although Y chromosomes were decondensed within root meristem in vivo, they became
Andrzej J. Joachimiak, Maria Moś, Janusz Malarz, Paweł Pasierbek, Magdalena Mosiołek   +4 more
doaj   +1 more source

Inheritance of H3K9 methylation regulates genome architecture in Drosophila early embryos [PDF]

Constitutive heterochromatin is essential for transcriptional silencing and genome integrity. The establishment of constitutive heterochromatin in early embryos and its role in early fruitfly development are unknown. Lysine 9 trimethylation of histone H3
Atinbayeva, Nazerke, Cecere, Germano, Erhardt, Sylvia, Gomez-Auli, Alejandro, Herur, Shwetha, Iovino, Nicola, Loeser, Eva, Mittler, Gerhard, Pyrowolakis, Giorgos, Quarato, Piergiuseppe, Rauer, Michael, Tiana, Guido, Valent, Iris, Zenk, Fides, Zhan, Yinxiu   +14 more
core   +2 more sources

The significance of cytogenetics for the study of karyotype evolution and taxonomy of water bugs (Heteroptera, Belostomatidae) native to Argentina [PDF]

, 2013
Male meiosis behaviour and heterochromatin characterization of three big water bug species were studied. Belostoma dentatum (Mayr, 1863), B. elongatum Montandon, 1908 and B. gestroi Montandon, 1903 possess 2n = 26 + X1X2Y (male).
Bressa, Maria Jose, Chirino, Monica Gabriela, Papeschi, Alba Graciela   +2 more
core   +2 more sources

Hypertranscription of rDNA Responsible for Nucleolar Remodelling is a Doorman for Acquiring Pluripotency

Cell Proliferation, EarlyView.
Active nucleoli have the capability to release perinuclear heterochromatin, which is a novel event of iPSC reprogramming. ABSTRACT Ribosome biogenesis occurs within the nucleolus, with the initial step being the transcription of ribosomal DNA (rDNA). Although rDNA transcription is limited in somatic cells, it is more active in stem cells. Nevertheless,
Yuchen Sun, Xinglin Hu, Xingwei Huang, Wenyao Zhou, Shubing Lan, Hui Zhang, Guangming Wu, Lei Lei   +7 more
wiley   +1 more source

Quantitative Analysis of Constitutive Heterochromatin in Couples with Fetal Wastage

American Journal of Reproductive Immunology, 1997
PROBLEM: Heteromorphism of constitutive heterochromatin is a stable evolutionary feature that is thought to cause no phenotypic alterations. Nevertheless, the role of constitutive heterochromatin is still unknown. The instability of constitutive heterochromatin was generally restricted to T‐lymphocytes and was associated with variable immunodeficiency.
Ljiljana Randić, A. Radojcic Badovinac, Ivica Vlastelić, Alena Buretić-Tomljanović   +3 more
openaire   +5 more sources

Biphasic euchromatin-to-heterochromatin transition on the KSHV genome following de novo infection. [PDF]

, 2013
The establishment of latency is an essential step for the life-long persistent infection and pathogenesis of Kaposi's sarcoma-associated herpesvirus (KSHV).
Brulois, Kevin, Izumiya, Yoshihiro, Jung, Jae U, Kung, Hsing-Jien, Lee, Hye-Ra, Tepper, Clifford, Toth, Zsolt   +6 more
core   +3 more sources

Transposable element sequence evolution is influenced by gene context [PDF]

arXiv, 2012
Background: Transposable elements (TEs) in eukaryote genomes are quantitatively the main components affecting genome size, structure and expression. The dynamics of their insertion and deletion depend on diverse factors varying in strength and nature along the genome.
arxiv  

Interaction of TFAP2A with the Ku70/80 complex is crucial for HIF‐dependent activation of hypoxia‐inducible genes

The FEBS Journal, EarlyView.
Under normoxic conditions, the SUMOylated fraction of TFAP2A cannot interact with the Ku70/Ku80 complex, nor it can bind to chromatin. The unSUMOylated fraction pre‐occupies the chromatin of a subset of hypoxia‐induced genes together with the Ku70/Ku80 complex for basal euchromatin formation. Under hypoxic conditions, the SUMOylation equilibrium shifts
Amalia Kanoura, Antonis Giakountis, Chrysa Filippopoulou, Angeliki Karagiota, George Stamatakis, Martina Samiotaki, George Panayotou, George Simos, Georgia Chachami   +8 more
wiley   +1 more source

Nde1 is required for heterochromatin compaction and stability in neocortical neurons

iScience, 2022
Summary: The NDE1 gene encodes a scaffold protein essential for brain development. Although biallelic NDE1 loss of function (LOF) causes microcephaly with profound mental retardation, NDE1 missense mutations and copy number variations are associated with
Alison A. Chomiak, Yan Guo, Caroline A. Kopsidas, Dennis P. McDaniel, Clara C. Lowe, Hongna Pan, Xiaoming Zhou, Qiong Zhou, Martin L. Doughty, Yuanyi Feng   +9 more
doaj  

The distribution pattern of 5-methylcytosine in rye (Secale L.) chromosomes.

PLoS ONE, 2020
The rye (Secale L.) genome is large, and it contains many classes of repetitive sequences. Secale species differ in terms of genome size, heterochromatin content, and global methylation level; however, the organization of individual types of sequences in
Anna Kalinka, Magdalena Achrem
doaj   +1 more source