Results 71 to 80 of about 25,717 (206)

A study of constitutive heterochromatin and NOR banding in three species of Indian major carps from the State of Haryana, India [PDF]

, 2012
Cytogenetic survey of fishes becomes increasingly important to establish chromosomal relation between the teleosts, to have a glimpse of the relation between chromosomal evolution and differentiation of vertebrate species.
Neeru, Neeru, Bhatnagar, Anita, Yadav, Abhay Singh   +2 more
core   +4 more sources

CHARACTERIZATION OF HUMAN CHROMOSOMAL CONSTITUTIVE HETEROCHROMATIN

Gulustan-Black Sea Scientific Journal of Academic Research, 2020
Heterochromatin of centromeric chromosome regions contains late replicating, largely repetitive DNA. It is suggested that heterochromatin participates in chromosome pairing, crossing-over and in chromosome disjunction control (1,3). Centromeric heterochromatin, a variety of heterochromatin, is a tightly packed form of DNA.Centromeric heterochromatin is
openaire   +1 more source

Maternal exercise improves vascular function in hypertensive offspring via A‐kinase anchoring protein 150 gene (Akap5) epigenetic modifications

British Journal of Pharmacology, EarlyView.
Background and Purpose Regular physical activity is an effective non‐pharmacological approach to hypertension management and maternal exercise improves offspring cardiovascular health, although mechanisms remain unclear. A‐kinase anchoring protein 150 (AKAP150) targets protein kinase Cα to L‐type Ca2+ channels (CaV1.2), enhancing vascular tone in ...
Fang Qiu, Yanyan Zhang, Meiling Shan, Jiaqi Cao, Zihan Fan, Zhaoxia Xu, Xiaozhen Ding, Xiaodong Liu, Lijun Shi   +8 more
wiley   +1 more source

RNA from a simple-tandem repeat is required for sperm maturation and male fertility in Drosophila melanogaster. [PDF]

, 2019
Tandemly-repeated DNAs, or satellites, are enriched in heterochromatic regions of eukaryotic genomes and contribute to nuclear structure and function. Some satellites are transcribed, but we lack direct evidence that specific satellite RNAs are required ...
Allshire, Brown, Cai, Chen, Demarco, Dernburg, Ding, Eren-Ghiani, Ferree, Herbert, Hoskins, Hoskins, Jagannathan, Jain, Jandura, Jayaramaiah Raja, Johnson, Kaessmann, Kelemen, Kost, Larracuente, Legendre, Lohe, Lohe, McKee, McNulty, Ni, Nicholson, Pathak, Rathke, Rathke, Rinn, Rošić, Shirai, Shpiz, Steinhauer, Strom, Sun, Velazquez Camacho, Wei, White-Cooper, White-Cooper, Yap, Yuan, Zhu   +44 more
core   +2 more sources

Integration of epigenetics into ecotoxicology: insights and fundamental research needs

Biological Reviews, EarlyView.
ABSTRACT Epigenetics refers to heritable changes in genome function that occur without direct alterations to the DNA sequence. A multitude of environmental contaminants can influence the epigenetic marks of a genome. Changes of epigenetic marks including DNA methylation, histone modifications, and non‐coding RNAs can induce alterations at the gene ...
Albano Pinto, Jana Asselman, Patrícia Pereira, Joana Luísa Pereira   +3 more
wiley   +1 more source

Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs)

Genetics and Molecular Biology, 2007
Chromosome analyses were performed in two grasshopper species of the genus Schistocerca, S. pallens and S. flavofasciata. Both species shared the same diploid number (2n = 23, X in males; 2n = 24, XX in females);and a conserved karyotype composed ...
Maria José de Souza, Natoniel Franklin de Melo   +1 more
doaj   +1 more source

Somatic Pairing in Drosophila virilis Mitosis [PDF]

, 1975
In neuroblast cells homologous chromosomes tend to pair during prophase of mitosis. Heterochromatic elements of homologous chromosomes are widely separated in very early prophase, at which time the euchromatin is poorly stained.
Guest, William C.
core   +2 more sources

The changing role of cell culture in the generation of transgenic livestock [PDF]

, 1999
Transgenesis may allow the generation of farm animals with altered phenotype, animal models for research and animal bioreactors. Although such animals have been produced, the time and expense involved in generating transgenic livestock and then ...
Farini, E, Webster, J, Whitelaw, C B
core   +1 more source

Roles of TIF1β in Leukemic Stem Cell Through SETDB1‐Dependent and Independent Mechanisms

Cancer Science, EarlyView.
In leukemic stem cell, BCR::ABL cooperates with TIF1β to open chromatin at oncogenes and close chromatin at differentiation regulators, driving leukemic reprogramming. In TIF1β‐deficient stem cell, the loss of TIF1β inverts this balance, showing closed chromatin at oncogenes and open chromatin at differentiation regulators.
Mariko Morii, Sho Kubota, Goro Sashida
wiley   +1 more source

Histone marks enable formation of immiscible phase-separated chromatin compartments

Cell Reports
Summary: Eukaryotic chromatin is organized into compartments for gene expression regulation, but the underlying mechanisms remain unclear. Here, we demonstrate that multivalent H3K27me3 and its reader, the CBX7-PRC1 complex, regulate facultative ...
Wenjing Sun, Jiacheng Wang, Wenqian Liu, Baixue Tang, Hongyuan Qu, Huanxing Su, Jianwei Wang, Haitao Li, Wei Xie, Pilong Li   +9 more
doaj   +1 more source