ScienceDaily: Biotechnology News |
- Control of gene expression: Mediator MED26 shifts an idling polymerase into high gear
- With climate changes, polar bear and brown bear lineages intertwine
- Ancestry of polar bears traced to Ireland
- Seven new mice species discovered
- Cortisol controls recycling of bile acids
- The turn of the corkscrew: Structural analysis uncovers mechanisms of gene expression
| Control of gene expression: Mediator MED26 shifts an idling polymerase into high gear Posted: 07 Jul 2011 09:19 AM PDT Scientists have identified a switch that allows RNA polymerase to shift gears from neutral into drive and start transcribing. This work sheds light on a process fundamental to all plant or animal cells and suggests how transcriptional anomalies could give rise to tumors.  |
| With climate changes, polar bear and brown bear lineages intertwine Posted: 07 Jul 2011 09:19 AM PDT 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 that the stress of climate change, occurring both long ago and today, may be responsible for surprising twists in the bears' history and future as well.  |
| Ancestry of polar bears traced to Ireland Posted: 07 Jul 2011 09:19 AM PDT Scientists have discovered that the female ancestor of all living polar bears was a brown bear that lived in the vicinity of present-day Britain and Ireland just prior to the peak of the last ice age -- 20,000 to 50,000 years ago. The research is expected to help guide future conservation efforts for polar bears, which are listed as threatened under the Endangered Species Act.  |
| Seven new mice species discovered Posted: 07 Jul 2011 08:10 AM PDT After living incognito for millions of years in a remote area of a forested mountain range in the Philippines, seven new-found species of mice owe their recent discovery to DNA evidence and the biologist who deciphered it.  |
| Cortisol controls recycling of bile acids Posted: 07 Jul 2011 07:20 AM PDT Cortisol is responsible for the recycling of bile acids from the blood, according to new research. If this recycling is disrupted, the animals develop gallstones and lose weight because they are no longer able to digest dietary fats. They also use more energy for heat production. The researchers assume that regulation of recycling serves the purpose of conserving energy efficiently in times of need.  |
| The turn of the corkscrew: Structural analysis uncovers mechanisms of gene expression Posted: 07 Jul 2011 05:21 AM PDT Scientists have clarified the structure and function of the remodeler Mot1 (Modifier of Transcription 1), which binds directly to DNA. Acting as a molecular corkscrew, Mot1 brings about a redistribution of a crucial transcription factor by removing it from specific locations on the DNA and facilitating its binding to other sequences.  |
| You are subscribed to email updates from ScienceDaily: Biotechnology News To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google Inc., 20 West Kinzie, Chicago IL USA 60610 | |
No comments:
Post a Comment