In 1998, scientists found the mammalian version of a gene, known as timeless, which in flies is crucial for the biological clock. However, all but one of the research groups involved determined that timeless did not have such a role in mammals. Now that research group says timeless is indeed a key timekeeper in mammals.
In a new complex molecular study of rats, published in the Oct. 17 issue of Science, researchers at the University of Illinois at Urbana-Champaign blocked the functional ability of timeless, leaving the circadian clock in disarray.
The key difference between the previous studies and this new one was the identification of two timeless proteins -- one a full-length protein and the other a shorter, incomplete version.
Jim Barlow | EurekAlert!
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The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
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Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
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