Navigation Links
NASA and university researchers find a clue to how life turned left
Date:7/25/2012

GREENBELT, Md. -- Researchers analyzing meteorite fragments that fell on a frozen lake in Canada have developed an explanation for the origin of life's handedness why living things only use molecules with specific orientations. The work also gave the strongest evidence to date that liquid water inside an asteroid leads to a strong preference of left-handed over right-handed forms of some common protein amino acids in meteorites. The result makes the search for extraterrestrial life more challenging.

"Our analysis of the amino acids in meteorite fragments from Tagish Lake gave us one possible explanation for why all known life uses only left-handed versions of amino acids to build proteins," said Dr. Daniel Glavin of NASA's Goddard Space Flight Center in Greenbelt, Md. Glavin is lead author of a paper on this research to be published in the journal Meteoritics and Planetary Science.

In January, 2000, a large meteoroid exploded in the atmosphere over northern British Columbia, Canada, and rained fragments across the frozen surface of Tagish Lake. Because many people witnessed the fireball, pieces were collected within days and kept preserved in their frozen state. This ensured that there was very little contamination from terrestrial life. "The Tagish Lake meteorite continues to reveal more secrets about the early Solar System the more we investigate it," said Dr. Christopher Herd of the University of Alberta, Edmonton, Canada, a co-author on the paper who provided samples of the Tagish Lake meteorite for the team to analyze. "This latest study gives us a glimpse into the role that water percolating through asteroids must have played in making the left-handed amino acids that are so characteristic of all life on Earth."

Proteins are the workhorse molecules of life, used in everything from structures like hair to enzymes, the catalysts that speed up or regulate chemical reactions. Just as the 26 letters of the alphabet are arra
'/>"/>

Contact: Bill Steigerwald
William.a.steigerwald@nasa.gov
301-286-5017
NASA/Goddard Space Flight Center
Source:Eurekalert

Page: 1 2 3 4 5

Related biology news :

1. University of Houston study shows BP oil spill hurt marshes, but recovery possible
2. University of Alberta led research may have discovered how memories are encoded in our brains
3. BGI, University of Helsinki and Wuhan University sign a MOU concerning cooperation on genomics
4. Marshall University study may lead to new treatments for prostate cancer
5. University leads £6 million EU project to tackle obesity
6. A University of Tennessee professors hypothesis may be game changer for evolutionary theory
7. Life expectancy may affect when you get married, divorced, have kids: Queens University study
8. University of Toronto biologists predict extinction for organisms with poor quality genes
9. University of Minnesota invention helps advance reliability of alternative energy
10. Israel names Tel Aviv Universitys Renewable Energy Center a Center of Research Excellence
11. University of Minnesota startup offers game-changing energy solutions that reduce CO2 emissions
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... two different ways that allow unprecedented experimental insights ... of oxygen molecules in photosynthesis. The two studies ... Nature Communications . , "The new knowledge will ... oxidation, which are key components for building artificial ... energy in fuels like hydrogen, ethanol or methanol," ...
(Date:7/11/2014)... evidence has demonstrated that transplantation of mesenchymal stem cells ... or mouse models of Alzheimer,s disease (AD) and improve ... ischemia. Few studies are reported on the therapeutic effect ... AD and on the effect on oxidative injury and ... Yan and her team, School of Life Sciences, Tsinghua ...
(Date:7/11/2014)... cannabinoid receptor type 1 can inhibit voltage-gated ... reduce neurotransmitter release. However, some scholars demonstrated ... extracellular Ca2+ influx and increase neurotransmitter release. ... Hospital Affiliated to Tongji Medical College, Huazhong ... whole cell voltage-clamp and calcium imaging in ...
Breaking Biology News(10 mins):Molecular snapshots of oxygen formation in photosynthesis 2
... that nanoparticles, which are now present in everything from ... irreparably damaging effects on soil systems and the environment. ... every year, including silver nanoparticles which are popular as ... Department of Biology. "We started to wonder what the ...
... have long known that landfills produce methane, but had a ... start out as a friendly environment for the organisms that ... that one species of microbe is paving the way for ... anaerobic bacterium called Methanosarcina barkeri appears to be ...
... Scientists at the University of Hull have identified ... treating cardiovascular disease and cancer. The team ... a protein called tissue factor into endothelial microparticles, tiny ... of blood vessels. "Although tissue factor is ...
Cached Biology News:Common nanoparticles found to be highly toxic to Arctic ecosystem 2Researchers ID microbe responsible for methane from landfills 2Research identifies on-off switch for key 'factor' in heart disease and cancer 2
(Date:7/10/2014)... Unraveling life’s mysteries can intrigue, amaze, and ... purchased a DNA test to unravel the ... a lifetime of memories, sharing, and closeness. In fact, ... genuinely brought the family closer together. , Recently, ... history and prior to taking the genetic ancestry ...
(Date:7/10/2014)... Senior supply chain management executives from ... the challenges of “Reducing Cost, Lead Time, & Defects ... sourcing. Describing the partnership of the Bio Supply Management ... Institute ( SCMI) of the University of San ... the Kroc Institute of Peace and Justice in San ...
(Date:7/10/2014)... PROVO, Utah , July 10, 2014 ... genome annotation and interpretation, today announced an ... sequencing (NGS) analytics for Lineagen,s NextStep Dx ... evaluation of neurodevelopmental and neurological disorders, currently ... chromosomal microarray (CMA) testing service used by ...
(Date:7/10/2014)... the fight against terrorism with the creation of a ... the use of light and special glass fibres. , ... Chemical , the researchers describe a novel optical fibre ... as 6.3 ppm (parts per million). It requires an ... explosives detection has involved looking for metals that encase ...
Breaking Biology Technology:Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Detecting trace amounts of explosives with light 2
... N.J., May 9, 2011 On May 17-18, ... organization created to support, mentor, and develop minority-, ... will host its fourth annual networking conference and ... at the Renaissance Newark Airport Hotel in Newark, ...
... 2011 Cell Biosciences, Inc. today announced the issuance ... and Trademark Office, Patent Nos. 7,935,489, 7,935,308 and 7,935,479. ... Biosciences, NanoPro™ Assay Technology. NanoPro assay systems utilize novel ... measurement of specific proteins in complex biological samples. These ...
... BURLINGTON, Mass., May 9, 2011 caprotec ... proprietary Capture Compound Mass Spectrometry (CCMS) platform technology for ... announced a second closing of EUR 1 million ($1.4 ... for the round to EUR 5 million ($7.2 M). ...
Cached Biology Technology:Diversity Alliance for Science to Host Fourth Annual Networking Conference and Expo 2Diversity Alliance for Science to Host Fourth Annual Networking Conference and Expo 3Diversity Alliance for Science to Host Fourth Annual Networking Conference and Expo 4caprotec bioanalytics Increases Series B Financing in Second Closing to EUR 5 Million 2
Multidrop Micro high speed 1 l bulk reagent dispenser rapidly, precisely and accurately dispenses microvolumes of 1-50 l into 384- and 96-well microplates....
...
...
Buckets for tube holder inserts...
Biology Products: