Results 21 to 30 of about 2,472,873 (391)

A family case of fertile human 45,X,psu dic(15;Y) males [PDF]

open access: yes, 2006
We report on a familial case including four male probands from three generations with a 45,X,psu dic(15;Y)(p11.2;q12) karyotype. 45,X is usually associated with a female phenotype and only rarely with maleness, due to translocation of small Y chromosomal
Andersson M   +29 more
core   +1 more source

Chromosome Structure: Coiling up chromosomes [PDF]

open access: yesCurrent Biology, 1995
The mechanism by which eukaryotic chromosomes condense as cells enter mitosis has long been inaccessible to molecular biologists. An important clue has now been provided by a ubiquitous protein family, the SMCs.
openaire   +2 more sources

The Transmembrane Protein Semi1 Positions Gamete Nuclei for Reciprocal Fertilization in Tetrahymena

open access: yesiScience, 2020
Summary: During sexual reproduction in the ciliate, Tetrahymena thermophila, cells of complementary mating type pair (“conjugate”) undergo simultaneous meiosis and fertilize each other.
Takahiko Akematsu   +4 more
doaj   +1 more source

Telomere-to-telomere assembly of a complete human X chromosome

open access: yesbioRxiv, 2019
After two decades of improvements, the current human reference genome (GRCh38) is the most accurate and complete vertebrate genome ever produced. However, no single chromosome has been finished end to end, and hundreds of unresolved gaps persist 1 , 2 ...
K. Miga   +51 more
semanticscholar   +1 more source

Principles of meiotic chromosome assembly revealed in S. cerevisiae [PDF]

open access: yes, 2019
During meiotic prophase, chromosomes organise into a series of chromatin loops emanating from a proteinaceous axis, but the mechanisms of assembly remain unclear.
A Goloborodko   +69 more
core   +2 more sources

Ultrastructural details of mammalian chromosome architecture

open access: yesbioRxiv, 2019
Over the past decade, 3C-related methods, complemented by increasingly detailed microscopic views of the nucleus, have provided unprecedented insights into chromosome folding in vivo.
Nils Krietenstein   +11 more
semanticscholar   +1 more source

Mitotic chromosomes

open access: yesSeminars in Cell & Developmental Biology, 2021
Our understanding of the structure and function of mitotic chromosomes has come a long way since these iconic objects were first recognized more than 140 years ago, though many details remain to be elucidated. In this chapter, we start with the early history of chromosome studies and then describe the path that led to our current understanding of the ...
James R. Paulson   +3 more
openaire   +2 more sources

PTBP1 enforces ATR-CHK1 signaling determining the potency of CDC7 inhibitors

open access: yesiScience, 2023
Summary: CDC7 kinase is crucial for DNA replication initiation and fork processing. CDC7 inhibition mildly activates the ATR pathway, which further limits origin firing; however, to date the relationship between CDC7 and ATR remains controversial.
Anja Göder   +6 more
doaj   +1 more source

A strategy for the characterization of minute chromosome rearrangements using multiple color fluorescence in situ hybridization with chromosome-specific DNA libraries and YAC clones [PDF]

open access: yes, 1993
The identification of marker chromosomes in clinical and tumor cytogenetics by chromosome banding analysis can create problems. In this study, we present a strategy to define minute chromosomal rearrangements by multicolor fluorescence in situ ...
A Kallioniemi   +31 more
core   +1 more source

Rad53 checkpoint kinase regulation of DNA replication fork rate via Mrc1 phosphorylation

open access: yeseLife, 2021
The Rad53 DNA checkpoint protein kinase plays multiple roles in the budding yeast cell response to DNA replication stress. Key amongst these is its enigmatic role in safeguarding DNA replication forks.
Allison W McClure, John FX Diffley
doaj   +1 more source

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