Re: [閒聊] NASA-Funded Research Discovers Life …
Published Online 2 December 2010
http://www.sciencemag.org/content/early/2010/12/01/science.1197258#aff-5
ABSTRACT
Life is mostly composed of the elements carbon, hydrogen, nitrogen, oxygen,
sulfur, and phosphorus. Although these six elements make up nucleic acids,
proteins, and lipids and thus the bulk of living matter, it is theoretically
possible that some other elements in the periodic table could serve the same
functions. Here, we describe a bacterium, strain GFAJ-1 of the
Halomonadaceae, isolated from Mono Lake, California, which substitutes
arsenic for phosphorus to sustain its growth. Our data show evidence for
arsenate in macromolecules that normally contain phosphate, most notably
nucleic acids and proteins. Exchange of one of the major bioelements may have
profound evolutionary and geochemical significance.
nature news:
http://www.nature.com/news/2010/101202/full/news.2010.645.html
※ 編輯: harry 來自: 140.109.48.200 (12/03 13:42)
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