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  • Aminoacyl imidazole  (1)
  • High-frequency discharge  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Differential coupling efficiency of chemically activated amino acid to tRNA (1984)
    Springer
    Journal of molecular evolution 20 (1984), S. 59-65 
    Details
    ISSN: 1432-1432
    Keywords: Primitive tRNA ; tRNA ; Aminoacyl imidazole ; Aminoacyl tRNA ; Amino acid charging ; Prebiotic ; Amino acid-polynucleotide interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Interaction based on possible chemical affinity of an amino acid for tRNA was examined as a model for the aminoacylation of primitive tRNA without aid of an enzyme system. Two types of reaction were carried out and compared. One was the acyl linkage of amino acid to the 5′-terminal phosphate of a tRNA activated as an imidazolide. The other was the incorporation of an amino acid activated as an imidazolide into 2′(3′)-hydroxyl groups of intact tRNA. Both types of reaction indicated that none of the amino acids tested had any selectivity for the tRNAs examined. However, the rates of reaction with a given tRNA were different among amino acids. In the second type of reaction, amino acids were found mainly at loop-out regions of tRNA, but not at either its 5′- or 3′-terminal sites
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101986
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of hydrocarbons under presumed prebiotic conditions using high-frequency discharge (1986)
    Springer
    Journal of molecular evolution 23 (1986), S. 113-118 
    Details
    ISSN: 1432-1432
    Keywords: Primordial terrestrial atmospheres ; CH4, C2H2, CO2 ; Prebiotic synthesis ; High-frequency discharge ; Hydrocarbons ; Gas chromatography ; Mass Spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Various hydrocarbons were synthesized by high-frequency discharge in a primordial terrestrial model atmosphere. The products were extracted by benzene or methanol and analyzed by GC-MS. The mean carbon chain length of the hydrocarbons formed by the discharge through pure CH4 gas was less than 6. Benzene was also obtained. Some isomers were obtained for each of the hydrocarbons containing a given number of carbons. When a small amount of C2H2 was added to the CH4, longer chain compounds were formed, as compared with discharge in CH4 only. However, when the amount of C2H2 was increased, unextractable high molecular weight compounds were produced. The amounts of products decreased as the mixing ratio of CO2 to CH4 increased. No hydrocarbons were detected when the ratio of CO2/CH4 exceeded 1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02099905
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