29-February-2008, 03:14 PM
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Vulcan Moderator
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Join Date: Oct 2001
Location: Greenbelt, MD
Posts: 24,135
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Natural processes seem to favor amino acid "handedness"
ASU researcher may have discovered key to life before its origin on Earth
Quote:
An important discovery has been made with respect to the mystery of “handedness” in biomolecules. Researchers led by Sandra Pizzarello, a research professor at Arizona State University, found that some of the possible abiotic precursors to the origin of life on Earth have been shown to carry “handedness” in a larger number than previously thought.
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“Thanks to the pristine nature of this meteorite, we were able to demonstrate that other extraterrestrial amino acids carry the left-handed excesses in meteorites and, above all, that these excesses appear to signify that their precursor molecules, the aldehydes, also carried such excesses,” Pizzarello said. “In other words, a molecular trait that defines life seems to have broader distribution as well as a long cosmic lineage.”
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