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Genetics News
Mon, 31 Aug 2015 14:02:11 EDT
Endangered animals can be identified by rate of genetic diversity loss
A new study presents a novel approach for identifying vertebrate populations at risk of extinction by estimating the rate of genetic diversity loss, a measurement that could help researchers and conservationists better identify and rank species that are threatened or endangered.
Mon, 31 Aug 2015 10:20:58 EDT
The structure of DNA made visible
From 1952, DNA was sequenced, modified and extensively studied, but no technique was able to produce clear direct images of DNA. Now, researchers have developed a new technique to produce a direct image of the DNA helix and its inner structure.
Mon, 31 Aug 2015 08:51:05 EDT
Biologists identify mechanisms of embryonic wound repair
The process of endocytosis -- how cells 'eat' by absorbing molecules -- drives rapid embryonic healing, scientists have discovered. They suggest the results should be used to design better treatments for wounds in adults.
Fri, 28 Aug 2015 14:29:35 EDT
Beyond royal jelly: Study identifies plant chemical that determines a honey bee's caste
A closer look at how honey bee colonies determine which larvae will serve as workers and which will become queens reveals that a plant chemical, p-coumaric acid, plays a key role in the bees' developmental fate.
Fri, 28 Aug 2015 13:52:44 EDT
Imitating viruses to deliver drugs to cells
Viruses are able to redirect the functioning of cells in order to infect them. Inspired by their mode of action, scientists have designed a "chemical virus" that can cross the double lipid layer that surrounds cells, and then disintegrate in the intracellular medium in order to release active compounds. To achieve this, the team used two polymers they had designed, which notably can self-assemble or dissociate, depending on the conditions.
Fri, 28 Aug 2015 11:27:37 EDT
DNA 'clews' used to shuttle CRISPR-Cas9 gene-editing tool into cells
Researchers have for the first time created and used a nanoscale vehicle made of DNA to deliver a CRISPR-Cas9 gene-editing tool into cells in both cell culture and an animal model.
Fri, 28 Aug 2015 10:22:54 EDT
Mathematician reveals the mechanism for sustaining biological rhythms
Scientists have predicted how biological circuits generate rhythms and control their robustness, utilizing mathematical modeling based on differential equations and stochastic parameter sampling.
Fri, 28 Aug 2015 08:14:54 EDT
A barcode for shredding junk RNA
A growing, dividing cell uses most of its energy store to make its "protein factories," the ribosomes. An important player in their "assembly" is the exosome, a molecular shredding machine that breaks down excess ribonucleic acid (RNA). Researchers have discovered how the exosome identifies its target RNA. The team identified a specific detection signal, comparable to a postal code or bar code that targets the exosome to the remote RNA.
Fri, 28 Aug 2015 08:13:14 EDT
Rules of communication in the nucleus: genes and nuclear pores need 'interpreters'
Nuclear pores in the nuclear membrane do not only control the transport of molecules into and out of the nucleus but also play an important role in gene expression. Researchers have deciphered a mechanism by which nuclear pores use "interpreters“ to directly influence gene expression.
Thu, 27 Aug 2015 21:59:31 EDT
Meningitis: Research advances on 'scourge' of transplant wards
The fungus Cryptococcus causes meningitis, a brain disease that kills about 1 million people each year. It's difficult to treat because fungi are genetically quite similar to humans, so compounds that affect fungi tend to have toxic side effects for patients. Now, researchers have identified 18 proteins that play a role in spore formation and germination. The findings raises the possibility of preventing the disease by blocking the spores' germination.
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