Abstract
A growing evidence has recently been accumulated on the presence of chiral, Cα- tetrasubstituted α-amino acids with a significant L (S) enantiomeric excess (up to 15%) in carbonaceous chondritic meteorites. The amino acids analysed to date, extracted from several samples of the Murchison and Murray meteorites, include isovaline (Iva), Cα-methyl norvaline [(αMe)Nva], Cα-methyl valine [(αMe)Val], Cα-methyl isoleucine [(αMe)Ile], and Cα-methyl allo isoleucine [(αMe)aIle] (Cronin and Pizzarello, 1997; Pizzarello and Cronin, 2000; Pizzarello et al., 2003).
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Crisma, M., Moretto, A., Formaggio, F., Kaptein, B., Broxterman, Q.B., Toniolo, C. (2004). A Possible Pathway for the Transfer of Chiral Bias from Extraterrestrial Cα-Tetrasubstituted α-Amino Acids to Proteinogenic Amino Acids. In: Seckbach, J., Chela-Flores, J., Owen, T., Raulin, F. (eds) Life in the Universe. Cellular Origin and Life in Extreme Habitats and Astrobiology, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1003-0_21
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DOI: https://doi.org/10.1007/978-94-007-1003-0_21
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