Results 11 to 20 of about 2,921 (283)

Crossover Interference on Nucleolus Organizing Region-Bearing Chromosomes in Arabidopsis [PDF]

Genetics, 2005
Abstract In most eukaryotes, crossovers are not independently distributed along the length of a chromosome. Instead, they appear to avoid close proximity to one another—a phenomenon known as crossover interference. Previously, for three of the five Arabidopsis chromosomes, we measured the strength of interference and suggested a model ...
Sandy Y. Lam, Sarah R. Horn, Sarah J. Radford, Elizabeth A. Housworth, Franklin W. Stahl, Gregory P. Copenhaver   +5 more
openalex   +4 more sources

The human nucleolus organizer regions [PDF]

Genes & Development, 2019
Although the nucleolus was first described in the early 19th century from both animal and plant cells, human nucleoli and particularly the five human nucleolus organizers have not been well characterized. In this issue of Genes & Development, van Sluis and colleagues (pp.
openaire   +2 more sources

Nucleolus organizer regions and nucleoli in preattachment bovine embryos [PDF]

Reproduction, 1988
Embryos (1-cell to elongated blastocyst stage) were recovered from superovulated heifers at surgery (Days 2-4; oestrus = Day 0), after slaughter (Day 4), or by transcervical flushing (Days 6, 7 and 14). The 175 embryos were cultured for 4, 8, 24 or 48 h, fixed on slides and sequentially stained with Giemsa and silver nitrate.
W A, King, A, Niar, I, Chartrain, K J, Betteridge, P, Guay   +4 more
openaire   +2 more sources

Colocalization of coilin and nucleolar proteins in Cajal body-like structures of micronucleated PtK2 cells

Brazilian Journal of Medical and Biological Research, 2004
Cajal bodies (CB) are ubiquitous nuclear structures involved in the biogenesis of small nuclear ribonucleoproteins and show narrow association with the nucleolus. To identify possible relationships between CB and the nucleolus, the localization of coilin,
N.P. Silva, D.M. Christofolini, R.A. Mortara, L.E.C. Andrade   +3 more
doaj   +1 more source

Trisomy 5p with bilateral congenital diaphragmatic hernia: a case report

Journal of Medical Case Reports, 2021
Background Bilateral congenital diaphragmatic hernia (CDH) is very rare. A few studies have reported the pathogenic role of 5p in CDH. Case presentation A 23-year-old primigravida Japanese woman was referred for the following abnormal findings at 33 ...
Noriyuki Nakamura, Takafumi Ushida, Yoshinori Moriyama, Kenji Imai, Tomoko Nakano-Kobayashi, Satoko Osuka, Maki Goto, Hiroaki Kajiyama, Hideyuki Asada, Masahiro Hayakawa, Tomomi Kotani   +10 more
doaj   +1 more source

Karyotype and chromosomal characteristics of rDNA of Cobitis strumicae Karaman, 1955 (Teleostei, Cobitidae) from Lake Volvi, Greece [PDF]

Comparative Cytogenetics, 2018
The karyotype of Greek cobitid fish Cobitis strumicae Karaman, 1955, from Lake Volvi, Greece, a representative of one of its two major intraspecific phylogenetic lineages, was analysed by means of sequential Giemsa-staining, C-banding, silver-staining ...
Eva Hnátková, Costas Triantaphyllidis, Catherine Ozouf-Costaz, Lukáš Choleva, Zuzana Majtánová, Joerg Bohlen, Petr Ráb   +6 more
doaj   +2 more sources

Looking for genetic effects of polluted anthropized environments on Caiman crocodilus crocodilus (Reptilia, Crocodylia): A comparative genotoxic and chromosomal analysis

Ecotoxicology and Environmental Safety, 2021
The Amazon aquatic ecosystems have been modified by the human population growth, going through changes in their water bodies and aquatic biota. The spectacled alligator (Caiman crocodilus crocodilus) has a wide distribution and adaptability to several ...
Vanessa Cristina Sales Oliveira, Patrik Ferreira Viana, Maria Claudia Gross, Eliana Feldberg, Ronis Da Silveira, Marcelo de Bello Cioffi, Luiz Antonio Carlos Bertollo, Carlos Henrique Schneider   +7 more
doaj   +1 more source

Ribosomal RNA genes shape chromatin domains associating with the nucleolus

Nucleus, 2019
Genomic interactions can occur in addition to those within chromosome territories and can be organized around nuclear bodies. Several studies revealed how the nucleolus anchors higher order chromatin structures of specific chromosome regions displaying ...
Ariadna Picart-Picolo, Nathalie Picault, Frédéric Pontvianne   +2 more
doaj   +1 more source

Alteration of rRNA gene copy number and expression in patients with intellectual disability and heteromorphic acrocentric chromosomes

Egyptian Journal of Medical Human Genetics, 2018
Background: Intellectual disability (ID) is an important medical and social problem that can be caused by different genetic and environmental factors. One such factor could be rDNA amplification and changes in rRNA expression and maturation.
Irina S. Kolesnikova, Alexander A. Dolskiy, Natalya A. Lemskaya, Yulia V. Maksimova, Asia R. Shorina, Alexander S. Graphodatsky, Ekaterina M. Galanina, Dmitry V. Yudkin   +7 more
doaj   +1 more source

TP53 R249S mutation in hepatic organoids captures the predisposing cancer risk

Hepatology, EarlyView., 2022
The systematic approach in elucidating the gain‐of‐function (GOF) roles of TP53 mutations in early liver carcinogenesis. Unique downstream targets of TP53 L3 mutations were identified from chormatin immunoprecipitation sequencing in HCC cell lines, followed by a series of validation assays to substantiate the exclusive transcriptional regulations ...
Yin Kau Lam, Jianqing Yu, Hao Huang, Xiaofan Ding, Alissa M. Wong, Howard H. Leung, Anthony W. Chan, Kelvin K. Ng, Mingjing Xu, Xin Wang, Nathalie Wong   +10 more
wiley   +1 more source