Carbon isotope evidence for the substrates and mechanisms of prebiotic synthesis in the early solar system
Carbon isotope evidence for the substrates and mechanisms of prebiotic synthesis in the early solar system
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早期太阳系中生命起源前合成的底物和机制的碳同位素证据
DOI:
10.1016/j.gca.2020.09.026
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发表时间:
2021
影响因子:
5
通讯作者:
Eiler, J.M.
中科院分区:
文献类型:
--
作者:
Chimiak, L.;Elsila, J.E.;Dallas, B.;Dworkin, J.P.;Aponte, J.C.;Sessions, A.L.;Eiler, J.M.
Meteorites contain prebiotic, bio-relevant organic compounds including amino acids. Their syntheses could result from diverse sources and mechanisms and provide a window on the conditions and materials present in the early solar system. Here we constrain alanine’s synthetic history in the Murchison meteorite using site-specific13C/12C measurements, reported relative to the VPDB standard. The δ13CVPDBvalues of −29 ± 10‰, 142 ± 20‰, and −36 ± 20‰ for the carboxyl, amine-bound, and methyl carbons, respectively, are consistent with Strecker synthesis of interstellar-medium-derived aldehydes, ammonia, and low-δ13C nebular or interstellar-medium-derived CN. We report experimentally measured isotope effects associated with Strecker synthesis, and use them to constrain the δ13C values of the alanine precursors, which we then use to construct a model that predicts the molecular-average δ13C values of 19 other organic compounds of prebiotic significance found in Murchison if they were made by our proposed synthetic network. Most of these predictions agree with previous measurements, suggesting that interstellar-medium-derived aldehydes and nebular and/or pre-solar CN could have served as substrates for synthesis of a wide range of prebiotic compounds in the early solar system.
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影响因子:
5
作者:
S. Pizzarello;R. Krishnamurthy;Samuel Epstein;John R. Cronin
通讯作者:
S. Pizzarello;R. Krishnamurthy;Samuel Epstein;John R. Cronin
DOI:
10.1111/j.1365-3040.2011.02308.x
发表时间:
2011-07
期刊:
Plant, cell & environment
影响因子:
--
作者:
A. Gilbert;Virginie Silvestre;Nicolas Segebarth;G. Tcherkez;C. Guillou;R. Robins;S. Akoka;G. Remaud
通讯作者:
A. Gilbert;Virginie Silvestre;Nicolas Segebarth;G. Tcherkez;C. Guillou;R. Robins;S. Akoka;G. Remaud
影响因子:
3.4
作者:
Aponte, Jose C.;Elsila, Jamie E.;Dworkin, Jason P.
通讯作者:
Dworkin, Jason P.
DOI:
--
发表时间:
1961
期刊:
影响因子:
--
作者:
K. Lynn;P. E. Yankwich
通讯作者:
P. E. Yankwich
DOI:
--
发表时间:
1954
期刊:
影响因子:
--
作者:
K. B. Wiberg
通讯作者:
K. B. Wiberg