Summary
A carbonaceous chondrite from the Antarctic, referred to as the Allan Hills meteorite 77306, appears to be free from terrestrial organic contamination. The presence of both protein and non-protein amino acids and an equal abundance of D- and L-enantiomers of amino acids, is testimony to the extraterrestrial nature of these compounds.
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Kotra, R.K., Shimoyama, A., Ponnamperuma, C. et al. Amino acids in a carbonaceous chondrite from Antarctica. J Mol Evol 13, 179–183 (1979). https://doi.org/10.1007/BF01739477
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DOI: https://doi.org/10.1007/BF01739477