Alanine enantiomers in the Murchison meteorite

S. Pizzarello and J. R. Cronin
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S. Pizzarello: Arizona State University
J. R. Cronin: Arizona State University

Nature, 1998, vol. 394, issue 6690, 236-236

Abstract: Abstract Engel and Macko 1 have reported that alanine indigenous to the Murchison meteorite has an l-enantiomer excess of about 33%. Furthermore, they reported very similar δ15nitrogen values for l-alanine and d-alanine; these values are quite high in comparison with those of terrestrial amino acids. On this basis, they argued that contamination of the meteorite by terrestrial l-alanine can be ruled out because, if it contributed to the l-enantiomer excess, the lower 15N content of terrestrial l-alanine would significantly lower the δ15N value that they observed for l-alanine.

Date: 1998
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DOI: 10.1038/28306

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