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6 March 2014 1:04 pm ,
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Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
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ScienceShot: Centrosomes Get Their Close-Up
21 August 2012 7:01 pm
The gears that help cells divide are coming into clearer focus. Researchers have used a new type of super-resolution microscopy to zoom in on centrosomes, which anchor the fibers that enable chromosomes to separate during cell division. Centrosomes have intrigued scientists since their discovery in the late 1800s, in part because cancer cells often amass extra copies of the structures. But they’re so tiny that they’re barely visible through traditional light microscopes, and researchers haven’t nailed down how they form and what role they play in cancer. So cell biologist David Glover of the University of Cambridge in the United Kingdom and his postdoc Jingyan Fu turned to three-dimensional structured illumination microscopy to provide sharper portraits of centrosomes and to pinpoint several proteins they harbor. Each centrosome consists of two cylindrical components called centrioles shrouded by a molecular cloud, which balloons when cells start the process of division. As the team reveals online today in Open Biology, many of the cloud proteins first gather on the centrioles, moving into the cloud once division begins. That’s the case with the protein Cnn (green), shown above close to the cylindrical centriole (top) and dispersed in the cloud (bottom, inset). With further research, scientists might be able to determine how different proteins interact to construct centrosomes. “We can put the molecular jigsaw together,” Glover says.
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