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Tag: "dual" at biology news

Newly identified mechanism helps explain why people of African descent are more vulnerable to TB

...rm, are dramatically increased. The result of this dual activation is the cleavage of a preexistent protein to a small peptide called cathelicidin, which can kill TB bacilli in the test tube. One of the interesting aspects of this mechanism is that production of vitamin D in humans is dependent on expos...

New possibilities for flu antiviral and vaccine research emerge from 'Spanish flu' virus

...ovides guidance and advice on the implications for dual use research and publication," Kennedy said. To make the virus, the researchers used an approach called "reverse genetics," which involves transferring gene sequences of viral RNA into bacteria and then inserting combinations of the genes -- often a...

Trio of plant genes prevent 'too many mouths'

...to their normal size appears to have an unexpected dual purpose of keeping the plant from wallpapering itself with too many densely clustered stomata. "It's surprising that size and stomata patterning ?both key to plants being able to survive on dry land ?are using the same signaling components," says Je...

Life's origins were easier than was thought

...seems that the first RNA chains would have had the dual role of self-replicating (as is today the case wit...l reactions of the cell activity. Because of their dual role, these cells are called ribozymes (a contraction of the words ribosome and enzyme). But there ...

Nose odors and mouth odors: The brain distinguishes

...unched their exploration into the brain's possible dual response to odors because of the well-known phenomenon that sensing an odor "orthonasally" through the nose triggers the perception that it is coming from the outside world, while sensing it through the mouth--or "retronasally"--causes the perception...

Norovirus found to cause traveler's diarrhea

...cause of traveler's diarrhea, thus indicating that dual infections among individuals experiencing traveler's diarrhea may be more common than previously thought. The authors said that further research into the role of Noroviruses in traveler's diarrhea is warranted. The simple, inexpensive molecular diag...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...says Tim Rodwell, an epidemiologist who served the dual role of camp doctor and electronics guru. Rodwell and O'Connell-Rodwell supervised construction of the campsite, which included four elevated tents, a cooking/dining area and a 20-foot-tall, two-story observation tower with a commanding view of the ...

New understanding of DNA repair may pave way to cancer treatments

...ermining how molecules like ATF2 can balance their dual roles. "High doses of radiation, as well as changes that take place in cancer and pathologic situations, can activate both functions of ATF2, which is expected to disturb the otherwise conserved balance between its role in gene regulation and the DNA...

Newly-discovered class of genes determines ?and restricts ?stem cell fate

...e of Nature. The scientists found that Pax3 plays dual ?and somewhat seemingly contradictory ?roles in ad...revents the final act," says Epstein. "I call this dual function a "biological capacitor," because Pax3 tells the cell: Get ready to go, but at the same tim...

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