Results 51 to 60 of about 57,771 (301)

LSD1 is essential for oocyte meiotic progression by regulating CDC25B expression in mice [PDF]

open access: yes, 2015
Mammalian oocytes are arrested at prophase I until puberty when hormonal signals induce the resumption of meiosis I and progression to meiosis II.
Chen, T   +8 more
core   +1 more source

Arpp19 in prophase I resumption [PDF]

open access: yesCell Cycle, 2017
Mitotic division depends on the phosphorylation of numerous proteins that orchestrate the structural rearrangements of the cell.
A. Castro, T. Lorca
openaire   +1 more source

Hexavalents in spermatocytes of Robertsonian heterozygotes between Mus m. domesticus 2n 26 from the Vulcano and Lipari Islands (Aeolian Archipelago, Italy) [PDF]

open access: yes, 2018
The size and shape of the chromosomes, as well as the chromosomal domains that compose them, are determinants in the distribution and interaction between the bivalents within the nucleus of spermatocytes in prophase I of meiosis.
Eliana Ayarza   +6 more
core   +3 more sources

Immunocytochemical localization of chromatin regions UV-microirradiated in S phase or anaphase : Evidence for a territorial organization of chromosomes during cell cycle of cultured Chinese hamster cells [PDF]

open access: yes, 1983
Chinese hamster cells (M3-1 line) in S phase were laser-UV-microirradiated (λ, 257 nm) at a small site of the nucleus. Cells were fixed either immediately thereafter or in subsequent stages of the cell cycle, including prophase and metaphase.
Avivi   +33 more
core   +1 more source

Leagues of their own: sexually dimorphic features of meiotic prophase I

open access: yesChromosoma, 2019
Meiosis is a conserved cell division process that is used by sexually reproducing organisms to generate haploid gametes. Males and females produce different end products of meiosis: eggs (females) and sperm (males). In addition, these unique end products
Cori K. Cahoon, Diana E. Libuda
semanticscholar   +1 more source

Elimination of Ribosomes during Meiotic Prophase

open access: yesNature, 1967
AT the conclusion of the meiotic divisions in the angiosperm anther, the cytoplasm of each mother cell is partitioned more or less equally between the four daughter spores, which then become isolated from each other by the formation of the callose tetrad wall.
Mackenzie, A   +2 more
openaire   +2 more sources

HIM-10 is required for kinetochore structure and function on Caenorhabditis elegans holocentric chromosomes. [PDF]

open access: yes, 2001
Macromolecular structures called kinetochores attach and move chromosomes within the spindle during chromosome segregation. Using electron microscopy, we identified a structure on the holocentric mitotic and meiotic chromosomes of Caenorhabditis elegans ...
Albertson   +33 more
core   +2 more sources

Three-dimensional positioning and structure of chromosomes in a human prophase nucleus

open access: yesScience Advances, 2017
High-resolution three-dimensional structure of chromosomes in a human prophase nucleus from electron microscopy. The human genetic material is packaged into 46 chromosomes. The structure of chromosomes is known at the lowest level, where the DNA chain is
Bo Chen   +5 more
semanticscholar   +1 more source

The evolution of illness phases in schizophrenia: A non-parametric item response analysis of the Positive and Negative Syndrome Scale

open access: yesSchizophrenia Research: Cognition, 2014
Background: The Positive and Negative Syndrome Scale (PANSS) assesses multiple domains of schizophrenia. Evaluation of each of these domains was conducted to assess differences in the characteristics of psychopathology and their relative predominance in ...
Anzalee Khan   +7 more
doaj   +1 more source

Developmental regulation of an organelle tether coordinates mitochondrial remodeling in meiosis. [PDF]

open access: yes, 2018
Cellular differentiation involves remodeling cellular architecture to transform one cell type to another. By investigating mitochondrial dynamics during meiotic differentiation in budding yeast, we sought to understand how organelle morphogenesis is ...
Berchowitz, Luke   +5 more
core   +2 more sources

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