A simple cut to the skin unleashes a complex cascade of chemistry to stem the flow of blood. Now, scientists at Washington University School of Medicine in St. Louis have used evolutionary clues to reveal how a key clotting ...
Biochemistry
Jul 20, 2011
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Polar bears' unique characteristics allow them to survive in one of the most extreme environments on Earth, but that survival is now threatened as rising temperatures and melting ice reshape the Arctic landscape. Now it appears ...
Plants & Animals
Jul 7, 2011
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Researchers at RIKEN have uncovered a mechanism by which the effects of stress in the fly species Drosophila are inherited epigenetically over many generations through changes to the structure of chromatin, the material that ...
Cell & Microbiology
Jun 23, 2011
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The proteasome is the garbage-disposal system of the cell, enzymatically clearing away unwanted proteins. Since this requires the recognition of individual targets within the crowded cellular environment, it is critically ...
Biochemistry
Apr 28, 2011
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Researchers at the National Institutes of Health have deciphered a key sequence of events governing whether the stem cells that produce red and white blood cells remain anchored to the bone marrow, or migrate into the circulatory ...
Cell & Microbiology
Mar 25, 2009
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Scientists at the University of Liverpool have demonstrated how a single-celled organism, living freely in the environment, could be a source of Salmonella transmission to animals and humans.
Cell & Microbiology
Mar 23, 2009
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