Extraterrestrial nucleobases in the Murchison meteorite

  title={Extraterrestrial nucleobases in the Murchison meteorite},
  author={Z. Martins and O. Botta and M. Fogel and M. Sephton and D. Glavin and J. Watson and J. Dworkin and A. Schwartz and P. Ehrenfreund},
  journal={Earth and Planetary Science Letters},
Abstract Carbon-rich meteorites, carbonaceous chondrites, contain many biologically relevant organic molecules and delivered prebiotic material to the young Earth. We present compound-specific carbon isotope data indicating that measured purine and pyrimidine compounds are indigenous components of the Murchison meteorite. Carbon isotope ratios for uracil and xanthine of δ13C = + 44.5‰ and + 37.7‰, respectively, indicate a non-terrestrial origin for these compounds. These new results demonstrate… Expand

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