Assessing the origins of aliphatic amines in the Murchison meteorite from their compound-specific carbon isotopic ratios and enantiomeric composition

@article{Aponte2014AssessingTO,
  title={Assessing the origins of aliphatic amines in the Murchison meteorite from their compound-specific carbon isotopic ratios and enantiomeric composition},
  author={José C. Aponte and Jason P. Dworkin and Jamie E. Elsila},
  journal={Geochimica et Cosmochimica Acta},
  year={2014},
  volume={141},
  pages={331-345}
}

Figures and Tables from this paper

Compound‐specific carbon isotope compositions of aldehydes and ketones in the Murchison meteorite
TLDR
Comparisons between δ13C compositions of meteoritic aldehydes and ketones and other organic compound classes were used to evaluate potential structural relationships and associated reactions, including Strecker synthesis and alteration-driven chemical pathways.
Indigenous aliphatic amines in the aqueously altered Orgueil meteorite
The CI1 Orgueil meteorite is a highly aqueously altered carbonaceous chondrite. It has been extensively studied, and despite its extensive degree of aqueous alteration and some documented instances
Possible effects of diagenesis on the stable isotope composition of amino acids in carbonaceous meteorites
  • M. Engel
  • Environmental Science
    SPIE Optical Engineering + Applications
  • 2015
The initial report of indigenous, non-racemic protein amino acids (L-enantiomer excess) in the Murchison meteorite was based on the fact that only eight of the twenty amino acids characteristic of
Molecular distribution, 13C‐isotope, and enantiomeric compositions of carbonaceous chondrite monocarboxylic acids
TLDR
A novel methodology for the simultaneous analysis of the molecular distribution, compound-specific δ13C and enantiomeric compositions of aliphatic monocarboxylic acids (MCA) extracted from the hot-water extracts of sixteen carbonaceous chondrites from CM, CR, CO, CV and CK groups is developed.
Analysis of amino acids, hydroxy acids, and amines in CR chondrites
TLDR
The isotopic compositions of compounds reported here did not reveal definitive links between the different compound classes such as common synthetic precursors, but will provide a framework for further future in‐depth analyses.
Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history
TLDR
The low content of monoamines in pristine CO carbonaceous chondrites suggests that the initial amounts, and not asteroidal processes, play a dominant role in the content of Monoamines in carbonaceous Chondrites.
Pathways to Meteoritic Glycine and Methylamine.
TLDR
This work examines potential synthetic routes of glycine and methylamine from a common set of precursors present in carbonaceous chondrite meteorites, using data from laboratory analyses of the well-studied CM2 meteorite Murchison and aims to contextualize the current knowledge about gas-phase reactions and irradiated ice grain chemistry for the synthesis of these species through parent body processes.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 83 REFERENCES
Unusual stable isotope ratios in amino acid and carboxylic acid extracts from the Murchison meteorite
TLDR
The isotopic composition of hydrogen, nitrogen and carbon in amino acid and monocarboxylic acid extracts from the Murchison meteorite confirms the extraterrestrial origin of both classes of compound, and provides the first evidence suggesting a direct relationship between the massive organo-synthesis occurring in interstellar clouds and the presence of pre-biotic compounds in primitive planetary bodies.
The Chiral Amines of the Murchison Meteorite: A Preliminary Characterization
L-enantiomeric excesses have been determined for some amino acids of the Murchison and Murray meteorites [1-4]. The finding has taken a particular significance in view of the homochiral distribution
Carbon isotope composition of low molecular weight hydrocarbons and monocarboxylic acids from Murchison meteorite
TLDR
The results suggest the possibility that the production mechanisms for hydrocarbons and carboxylic acids may be similar and impose constraints on the identity of the reactant species, and are consistent with the kinetically controlled synthesis of higher homologues from lower ones.
Isotopic analyses of amino acids from the Murchison meteorite.
Organic matter in meteorites: molecular and isotopic analyses of the Murchison meteorite.
Carbonaceous chondrites comprise a unique subset of meteorites. Two classes of carbonaceous chondrites, the so-called CI1 and CM2 chondrites, are particularly interesting, in part because of their
Carbon isotope composition of individual amino acids in the Murchison meteorite
TLDR
The amino acids in the Murchison meteorite are enriched in 13C, indicating an extraterrestrial origin, and Alanine is not racemic, and the 13C enrichment of its D- and L-enantiomers implies that the excess of the L- enantiomer is indigenous rather than terrestrial contamination, suggesting that optically active materials were present in the early Solar System before life began.
Isotopic evidence for extraterrestrial non- racemic amino acids in the Murchison meteorite
TLDR
It is shown that individual amino-acid enantiomers from Murchison are enriched in 15N relative to their terrestrial counterparts, so confirming an extraterrestrial source for an L-enantiomer excess in the Solar System that may predate the origin of life on the Earth.
...
1
2
3
4
5
...