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Bigger horns equal better genes
06-05-2007 · EurekAlert!According to a team of international researchers, mature, male alpine ibex demonstrate a correlation between horn growth and genetic diversity. The researchers believe their study offers evidence to support the mutation accumulation theory of ageing, which is the idea that, because natural selection weakens with age, genetic mutations have effects that accumulate over time.
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Keywords: horns, equal, genes, horn, gene
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- One species' entire genome discovered inside another's
08-30-2007 · EurekAlert!
Scientists at the University of Rochester and the J. Craig Venter Institute have discovered a copy of the entire genome of a bacterial parasite residing inside the genome of its host species.The finding, reported in today's Science, suggests that lateral gene transfer -- the movement of genes between unrelated species -- may happen much more frequently between bacteria and multicellular organisms than scientists previously believed, posing dramatic implications for evolution.
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- Scientists discover tiny RNAs play a big role in controlling genes
10-25-2007 · EurekAlert!
PiRNAs, a recently discovered class of tiny RNAs, play an important role in controlling gene function.
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- Cigarettes leave deadly path by purging protective genes
01-23-2008 · EurekAlert!
A University of Rochester scientist discovered that the toxins in cigarette smoke wipe out a gene that plays a vital role in protecting the body from the effects of premature aging. Without this gene we not only lose a bit of youthfulness -- but the lungs are left open to destructive inflammation and diseases such as chronic obstructive pulmonary disease and lung cancer.
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- Location matters, even for genes
02-13-2008 · EurekAlert!
Moving an active gene from the interior of the nucleus to its periphery can inactivate that gene report scientists from the University of Chicago Medical Center in Nature. Attachment to the inner nuclear membrane, they show, can silence genes, preventing their transcription -- a novel form of gene regulation.
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- 2 heads are better than 1: 2 dysfunctional DNA repair pathways kill tumor cells
04-12-2007 · EurekAlert!
Individuals who inherit one mutant copy of any one of about 12 genes that make the proteins of the Fanconi Anemia pathway are at increased risk of developing cancer. This occurs when the remaining "good" copy of the gene becomes mutated in a specific cell type. However, hope of a new treatment for these cancers has now been provided by a new study indicating that inhibiting the protein ATM can kill these cancer cells.
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- Gene expression profiling of dengue virus infection in cell lines and patients
11-06-2007 · EurekAlert!
Researchers at the Novartis Institute for Tropical Diseases and the Genome Institute of Singapore have identified new host genes associated with dengue virus infection, which may open new avenues to developing a drug to treat the disease. The results suggest that drugs that target the host pathways may prove effective against dengue.
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- University of Toronto finds humans and chimps differ at level of gene splicing
11-14-2007 · EurekAlert!
Researchers are closer to understanding why humans differ so greatly from chimpanzees in the way they look, behave, think and fight off disease, despite having genes that are nearly 99 percent identical.
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- Losses of long-established genes contribute to human evolution
12-13-2007 · EurekAlert!
While it is well understood that the evolution of new genes leads to adaptations that help species survive, gene loss may also afford a selective advantage. A group of scientists at the University of California-Santa Cruz led by biomolecular engineering professor David Haussler has investigated this less-studied idea, carrying out the first systematic computational analysis to identify long-established genes that have been lost across millions of years of evolution leading to the human species.
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- New gene test for prostate cancer at hand
01-17-2008 · EurekAlert!
Men with susceptibility for prostate cancer will soon be identifiable through a simple DNA test. So hope scientists at the Swedish medical university Karolinska Institutet, who have shown that men carrying a combination of known risk genes run a four to five times higher risk of developing prostate cancer. At present, men with suspected prostate cancer are identified mainly using what are known as PSA tests. However, the test has a relatively low sensitivity and better methods are needed.
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- Comparing Chimp, Human DNA
10-13-2006 · ScienceDaily
Most of the big differences between human and chimpanzee DNA lie in regions that do not code for genes, according to a new study. Instead, they may contain DNA sequences that control how gene-coding regions are activated and read.
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