• Publications
  • Influence
Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases
  • M. Callahan, Karen E Smith, +5 authors J. Dworkin
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences
  • 11 August 2011
All terrestrial organisms depend on nucleic acids (RNA and DNA), which use pyrimidine and purine nucleobases to encode genetic information. Carbon-rich meteorites may have been important sources ofExpand
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Comet 81P/Wild 2 Under a Microscope
The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatileExpand
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Racemic amino acids from the ultraviolet photolysis of interstellar ice analogues
The delivery of extraterrestrial organic molecules to Earth by meteorites may have been important for the origin and early evolution of life. Indigenous amino acids have been found in meteorites—overExpand
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Enrichment of the amino acid l-isovaline by aqueous alteration on CI and CM meteorite parent bodies
  • D. Glavin, J. Dworkin
  • Chemistry, Medicine
  • Proceedings of the National Academy of Sciences
  • 7 April 2009
The distribution and enantiomeric composition of the 5-carbon (C5) amino acids found in CI-, CM-, and CR-type carbonaceous meteorites were investigated by using liquid chromatography fluorescenceExpand
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Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars
The Sample Analysis at Mars (SAM) instrument on board the Mars Science Laboratory Curiosity rover is designed to conduct inorganic and organic chemical analyses of the atmosphere and the surfaceExpand
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The Photostability of Amino Acids in Space
Organic compounds observed in the interstellar medium and in solar system bodies are of particular importance for revealing the chemistry that may have led to life’s origin. Among these compounds,Expand
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Radar-Enabled Recovery of the Sutter’s Mill Meteorite, a Carbonaceous Chondrite Regolith Breccia
The Meteor That Fell to Earth In April 2012, a meteor was witnessed over the Sierra Nevada Mountains in California. Jenniskens et al. (p. 1583) used a combination of photographic and video images ofExpand
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Organics Captured from Comet 81P/Wild 2 by the Stardust Spacecraft
Organics found in comet 81P/Wild 2 samples show a heterogeneous and unequilibrated distribution in abundance and composition. Some organics are similar, but not identical, to those in interplanetaryExpand
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Extraterrestrial nucleobases in the Murchison meteorite
Abstract Carbon-rich meteorites, carbonaceous chondrites, contain many biologically relevant organic molecules and delivered prebiotic material to the young Earth. We present compound-specific carbonExpand
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The first cell membranes.
Organic compounds are synthesized in the interstellar medium and can be delivered to planetary surfaces such as the early Earth, where they mix with endogenous species. Some of these compounds areExpand
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