Document Detail

Prebiotic synthesis from CO atmospheres: implications for the origins of life.
MedLine Citation:
PMID:  12409606     Owner:  NLM     Status:  MEDLINE    
Most models of the primitive atmosphere around the time life originated suggest that the atmosphere was dominated by carbon dioxide, largely based on the notion that the atmosphere was derived via volcanic outgassing, and that those gases were similar to those found in modern volcanic effluent. These models tend to downplay the possibility of a strongly reducing atmosphere, which had been thought to be important for prebiotic synthesis and thus the origin of life. However, there is no definitive geologic evidence for the oxidation state of the early atmosphere and bioorganic compounds are not efficiently synthesized from CO(2) atmospheres. In the present study, it was shown that a CO-CO(2)-N(2)-H(2)O atmosphere can give a variety of bioorganic compounds with yields comparable to those obtained from a strongly reducing atmosphere. Atmospheres containing carbon monoxide might therefore have been conducive to prebiotic synthesis and perhaps the origin of life. CO-dominant atmospheres could have existed if the production rate of CO from impacts of extraterrestrial materials were high or if the upper mantle had been more reduced than today.
Shin Miyakawa; Hiroto Yamanashi; Kensei Kobayashi; H James Cleaves; Stanley L Miller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2002-10-30
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  99     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2002-11-13     Completed Date:  2003-01-15     Revised Date:  2013-04-18    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  14628-31     Citation Subset:  IM    
Department of Chemistry and Biotechnology, Faculty of Engineering, Yokohama National University, Japan.
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MeSH Terms
Carbon Dioxide
Carbon Monoxide*
Evolution, Chemical
Reg. No./Substance:
0/Gases; 124-38-9/Carbon Dioxide; 630-08-0/Carbon Monoxide; 7727-37-9/Nitrogen

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