Stardust, Supernovae and the Chirality of the Amino Acids

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A mechanism for creating enantiomerism in the amino acids, the building blocks of the proteins, that involves global selection of one chirality by interactions between the amino acids and neutrinos from core-collapse supernovae is described. The selection involves the dependence of the interaction cross sections on the orientations of the spins of the neutrinos and the 14N nuclei in the amino acids, or in precursor molecules, which in turn couple to the molecular chirality. The subsequent chemical evolution and galactic mixing would ultimately populate the Galaxy with the selected species. The resulting amino acids could either be the source thereof ... continued below

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14 p. (0.2 MB)

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Boyd, R N; Kajino, T & Onaka, T March 9, 2011.

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Description

A mechanism for creating enantiomerism in the amino acids, the building blocks of the proteins, that involves global selection of one chirality by interactions between the amino acids and neutrinos from core-collapse supernovae is described. The selection involves the dependence of the interaction cross sections on the orientations of the spins of the neutrinos and the 14N nuclei in the amino acids, or in precursor molecules, which in turn couple to the molecular chirality. The subsequent chemical evolution and galactic mixing would ultimately populate the Galaxy with the selected species. The resulting amino acids could either be the source thereof on Earth, or could have triggered the chirality that was ultimately achieved for Earth's amino acids.

Physical Description

14 p. (0.2 MB)

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PDF-file: 14 pages; size: 0.2 Mbytes

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  • Journal Name: International Journal of Molecular Sciences, vol. 12, n/a, May 31, 2011, pp. 3432; Journal Volume: 12

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  • Report No.: LLNL-JRNL-474633
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1021542
  • Archival Resource Key: ark:/67531/metadc837483

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  • March 9, 2011

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  • May 19, 2016, 3:16 p.m.

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  • April 13, 2017, 5:55 p.m.

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Boyd, R N; Kajino, T & Onaka, T. Stardust, Supernovae and the Chirality of the Amino Acids, article, March 9, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc837483/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.