2,444 results
2,444 results for: mutations
- Health & Medicine
Team locates anthrax-receptor protein
Scientists have identified the protein that enables the anthrax toxin to attach to cells and trigger disease, while another team has mapped the molecular structure of the toxin component that does most of the damage to cells.
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Inbred cattle don’t look bad at all
A herd of feral cattle that hasn't had new blood for at least 300 years seems to have avoided the genetic risks of inbreeding.
- Health & Medicine
Viral Survivor
Epstein-Barr virus, the cause of diseases ranging from mononucleosis to several kinds of cancer, has begun to reveal how it enters human cells and protects itself from the immune system.
- Health & Medicine
Standing Up to Gravity
Studies in space can help physicians better understand a disorder in which patients get faint or dizzy while standing.
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Channel Surfing
The newly revealed three-dimensional structures of proteins called ion channels reveal the secrets of their crucial function.
- Anthropology
Searching for the Tree of Babel
Researchers are using new methods of comparing languages to reveal information about the ancestry of different cultural groups and answer questions about human history.
- Health & Medicine
What Activates AIDS?
New studies suggest that a natural process called immune activation—the signaling that alerts immune cells of foreign invaders—plays a key role in explaining why infection with the human immunodeficiency virus progresses to AIDS more quickly in some people than in others.
- Health & Medicine
Have a heart: Turn on just a single gene
One gene appears to act as the master switch in embryonic heart formation.
- Health & Medicine
Honey of a Threat
An all-natural, organic food, honey has a benign–if not wholesome–image. Many people consider it a superior alternative to table sugar and corn syrup–two primary sweeteners in the U.S diet. Though attractive to bees, borage may lace its flowers nectar with toxic chemicals that could then show up in honey. James N. Roitman, USDA-ARS Comfrey, formerly […]
- Health & Medicine
Blood vessels (sans blood) shape organs
Even before they begin to carry blood, blood vessels provide signals that help spark the development of organs such as the liver.
- Health & Medicine
Radiation harms blood vessels before gut
The side-effects of radiation therapy may result from initial damage to blood vessels.
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Gene found for chloroplast movement
Scientists have found the gene that directs chloroplasts to dance out of a cell's shaded edges to soak up the sun or back into that shade when the light is too intense.
