News tagged with heterochromatin
A secret to night vision found in DNA's unconventional 'architecture'
Apr 16, 2009 |
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Researchers have discovered an important element for making night vision possible in nocturnal mammals: the DNA within the photoreceptor rod cells responsible for low light vision is packaged in a very unconventional way, ...
Search results for heterochromatin
Researchers discover mechanism that prevents two species from reproducing
Oct 26, 2009 |
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Cornell researchers have discovered a genetic mechanism in fruit flies that prevents two closely related species from reproducing, a finding that offers clues to how species evolve.
A solution to Darwin's 'mystery of the mysteries' emerges from the dark matter of the genome
Oct 26, 2009 |
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Biological species are often defined on the basis of reproductive isolation. Ever since Darwin pointed out his difficulty in explaining why crosses between two species often yield sterile or inviable progeny (for instance, ...
How does a worm build a throat? Tackling the 'organ formation puzzle'
Oct 06, 2009 |
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(PhysOrg.com) -- Mention worms to most people, and they probably think of fishing, gardening, or trips to the vet. Mention them to Susan E. Mango, and she begins telling you how “absolutely beautiful” they ...
Aurora B answers an XIST-ential question
Aug 24, 2009 |
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Early in development, mammalian female cells counteract their double dose of X chromosomes by coating one of them with a large RNA named XIST. The RNA binds to the same X chromosome from which it is transcribed ...
Researchers solve another mystery in B lymphocyte development
May 21, 2009 |
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A new study published online in Nature Immunology ahead of the June 2009 print issue has found that homologous immunoglobulin (lg) alleles pair up in the nucleus at stages that coincide with V(D)J recombination of the he ...
Good fences make good neighbors
May 14, 2009 |
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Our genome is a patchwork of neighborhoods that couldn't be more different: Some areas are hustling and bustling with gene activity, while others are sparsely populated and in perpetual lock-down. Breaking ...
When every photon counts
Apr 20, 2009 |
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The eyes of nocturnal mammals contain particularly large numbers of the highly light-sensitive rods, the photoreceptor type used for night vision. This allows the detection of light levels millions of times ...
Researchers explain process by which cells 'hide' potentially dangerous DNA segments
Apr 09, 2009 |
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The DNA in the 23 pairs of chromosomes in each of the billions of cells of the human body is so tightly packed that it would measure six feet in length if stretched end to end. A genome of this size can squeeze into a cell's ...
Roles of DNA packaging protein revealed
Biology /
Feb 12, 2009 |
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Scientists at Albert Einstein College of Medicine of Yeshiva University have found that a class of chromatin proteins is crucial for maintaining the structure and function of chromosomes and the normal development ...
Researchers map changing epigenetic modifications that enable transposons to run amok
Biology /
Dec 10, 2008 |
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Much like cancer cells, plant cells grown for a long time outside of their normal milieu, in culture dishes, have highly unstable genomes. Changes in gene activity, or how genes are "expressed," help cells cope with challenging ...
List of search results for heterochromatin
