The prebiotic synthesis of pyrimidines in frozen solution
| Autor: | Kevin E. Nelson, H. James Cleaves, Stanley L. Miller |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Evolution
Chemical Earth Planet Stereochemistry Prebiotic medicine.medical_treatment Origin of Life Mars RNA Uracil General Medicine Early Earth Combinatorial chemistry Solutions Atmosphere chemistry.chemical_compound Pyrimidines Saturn chemistry Jupiter Freezing medicine Molecule Ecology Evolution Behavior and Systematics Cytosine |
| Zdroj: | Naturwissenschaften. 93:228-231 |
| ISSN: | 1432-1904 0028-1042 |
| DOI: | 10.1007/s00114-005-0073-y |
| Popis: | Most prebiotic syntheses depend on the reaction of concentrated precursor compounds to produce bio-organic molecules. It is now believed that the early Earth's atmosphere was not reducing enough to have permitted copious synthesis of precursor molecules. Freezing allows reaction to occur even from dilute solution. This reaction has been demonstrated for the purines but not for the pyrimidines. It is shown here that dilute solutions of simple prebiotic molecules produce the biological pyrimidines cytosine and uracil upon freezing. Cold environments may have allowed synthesis of all of the RNA bases even from low organic yielding atmospheres, such as those of the early Earth, Mars, Titan and Europa. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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