NASA researchers help to explain why life is left-handed


	NASA researchers help to explain why life is left-handed

doodleicious

7-2-2009 4:24 AM

133 views

tags:

left, handed, life

doodleicious says:

this is interesting! there is more at source

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/102167fd-b889-4c87-94ae-d9c2ab32890c/1AF68514-5E31-49B5-8394-D1DDB2468A35/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.zmescience.com/nasa-researchers-help-explain-why-life-is-left-handed" href="http://www.zmescience.com/nasa-researchers-help-explain-why-life-is-left-handed" style="font-size: 11px;">www.zmescience.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.zmescience.com/nasa-researchers-help-explain-why-life-is-left-handed"><H1 class="singleh1">NASA researchers help explain why life is left-handed</H1></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.zmescience.com/nasa-researchers-help-explain-why-life-is-left-handed"><P>“We found more support for the idea that biological molecules, like amino acids, created in space and brought to Earth by meteorite impacts help explain why life is left-handed,” according to Dr. Daniel Glavin of NASA’s <A href="http://www.nasa.gov/centers/goddard/home/index.html">Goddard Space Flight Center</A> in Greenbelt, Md. “By that I mean why all known life uses only left-handed versions of amino acids to build proteins.”</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.zmescience.com/nasa-researchers-help-explain-why-life-is-left-handed"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/www.zmescience.com/img/1BE42985-0BEF-4370-B0BD-C8D22983F50A" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.zmescience.com/nasa-researchers-help-explain-why-life-is-left-handed"><P>“If you do [right handed molecules], life turns to something resembling scrambled eggs — it’s a mess. Since life doesn’t work with a mixture of left-handed and right-handed amino acids, the mystery is: how did life decide — what made life choose left-handed amino acids over right-handed ones?</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/1AF68514-5E31-49B5-8394-D1DDB2468A35/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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