Results 51 to 60 of about 346,273 (274)

Chromosome mapping of dragline silk genes in the genomes of widow spiders (araneae, theridiidae) [PDF]

open access: yes, 2010
With its incredible strength and toughness, spider dragline silk is widely lauded for its impressive material properties. Dragline silk is composed of two structural proteins, MaSp1 and MaSp2, which are encoded by members of the spidroin gene family ...
Ayoub, NA, Hayashi, CY, Zhao, Y
core   +3 more sources

Assessing the Epigenetic Status of Human Telomeres [PDF]

open access: yes, 2019
The epigenetic modifications of human telomeres play a relevant role in telomere functions and cell proliferation. Therefore, their study is becoming an issue of major interest.
Vaquero Sedas, María Isabel   +1 more
core   +1 more source

Mitotic and meiotic chromosomes of a southern Brazilian population of Boophilus microplus (Acari, Ixodidae)

open access: yesIheringia: Série Zoologia, 2002
Using conventional staining with acetic orcein and C-banding techniques it was investigated constitutive heterochromatin chromosomal polymorphisms and the mitotic and the meiotic behavior of male and female chromosomes of Boophilus microplus (Canestrini,
Rosane Nunes Garcia   +3 more
doaj   +1 more source

Investigation of marmoset hybrids (Cebuella pygmaea x Callithrix jacchus) and related Callitrichinae (Platyrrhini) by cross-species chromosome painting and comparative genomic hybridization [PDF]

open access: yes, 2005
We report on the cytogenetics of twin offspring from an interspecies cross in marmosets (Callitrichinae, Platyrrhini), resulting from a pairing between a female Common marmoset (Callithrix jacchus, 2n = 46) and a male Pygmy marmoset (Cebuella pygmaea, 2n
Canavez FC   +15 more
core   +1 more source

First constitutive heterochromatin characterization and Karyotype of white stork Ciconia ciconia (Aves: Ciconiidae)

open access: yesBrazilian Journal of Biology, 2021
The karyotype and constitutive heterochromatin pattern of the white stork Ciconia ciconia samples obtained from Manzala lake, Dimiaat, Egypt was described. Somatic cells of Ciconia ciconia samples have diploid number 2n= 68 chromosomes.
A. S. M. Abu Shnaf, M. S. Al-Khalifa
doaj   +1 more source

Heterochromatic hues of transcription—the diverse roles of noncoding transcripts from constitutive heterochromatin

open access: yesThe FEBS Journal, 2019
Constitutive heterochromatin has been canonically considered as transcriptionally inert chromosomal regions, which silences the repeats and transposable elements (TEs), to preserve genomic integrity.
Parna Saha, R. Mishra
semanticscholar   +1 more source

Sequence-dependent heterochromatin formation in the human malaria parasite Plasmodium falciparum

open access: yesHeliyon, 2023
The human malaria parasite Plasmodium falciparum represses transcription of the gene encoding AP2-G, which is the master regulator of germ cell differentiation, via heterochromatin condensation following histone H3 lysine 9 trimethylation (H3K9me3 ...
Toshiyuki Mori, Mai Nakashima
doaj  

Heterochromatin variation and LINE-1 distribution in Artibeus (Chiroptera, Phyllostomidae) from Central Amazon, Brazil

open access: yesComparative Cytogenetics, 2017
Species in the subgenus Artibeus Leach, 1821 are widely distributed in Brazil. Conserved karyotypes characterize the group with identical diploid number and chromosome morphology.
Érica Martinha Silva de Souza   +4 more
doaj   +3 more sources

DDM1-mediated R-loop resolution and H2A.Z exclusion facilitates heterochromatin formation in Arabidopsis

open access: yesScience Advances, 2023
Programmed constitutive heterochromatin silencing is essential for eukaryotic genome regulation, yet the initial step of this process is ambiguous.
Jincong Zhou   +9 more
semanticscholar   +1 more source

The Mbd1-Atf7ip-Setdb1 pathway contributes to the maintenance of X chromosome inactivation. [PDF]

open access: yes, 2014
BackgroundX chromosome inactivation (XCI) is a developmental program of heterochromatin formation that initiates during early female mammalian embryonic development and is maintained through a lifetime of cell divisions in somatic cells.
Bonora, Giancarlo   +5 more
core   +8 more sources

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