A search for endogenous amino acids in martian meteorite ALH84001.

  title={A search for endogenous amino acids in martian meteorite ALH84001.},
  author={Jeffrey L. Bada and Daniel P. Glavin and G. D. Mcdonald and Luann Becker},
  volume={279 5349},
Trace amounts of glycine, serine, and alanine were detected in the carbonate component of the martian meteorite ALH84001 by high-performance liquid chromatography. The detected amino acids were not uniformly distributed in the carbonate component and ranged in concentration from 0.1 to 7 parts per million. Although the detected alanine consists primarily of the L enantiomer, low concentrations (<0.1 parts per million) of endogenous D-alanine may be present in the ALH84001 carbonates. The amino… 
Amino acid signatures in carbonaceous meteorites
Carbonaceous chondrites, a class of stony meteorites that contains up to 3 weight-% of organic carbon, are subdivided into types by chemical and mineralogical characteristics. These meteorites are
A search for amino acids and nucleobases in the Martian meteorite Roberts Massif 04262 using liquid chromatography‐mass spectrometry
The presence of n‐ω‐amino acids may be due to a high temperature Fischer‐Tropsch‐type synthesis during igneous processing on Mars or impact ejection of the meteorites from Mars, but more experimental data are needed to support these hypotheses.
Indigenous amino acids in primitive CR meteorites
Abstract— –CR chondrites are among the most primitive meteorites. In this paper, we report the first measurements of amino acids in Antarctic CR meteorites. Three CRs, Elephant Moraine (EET) 92042,
Distribution and stable isotopic composition of amino acids from fungal peptaibiotics: assessing the potential for meteoritic contamination.
It is shown that the relatively simple distribution of the C(4) and C(5) amino acids in fungal peptides is distinct from the complex distribution observed in many carbonaceous chondrites, and potentially diagnostic relationships between the stable isotopic compositions of pairs of amino acids from the fungan peptides that may aid in ruling out fungal contamination as a source of meteoritic amino acids.
Search for Enantiomeric Excess in Extraterrestrial Samples. Interest for Mars Sample Return
A remarkable characteristic of proteinic amino acids is their homochirality: only one optical isomer (L) is present in terrestrial life, in contrast with the racemic mixture produced by most chemical amino acids production scheme.
Abundant extraterrestrial amino acids in the primitive CM carbonaceous chondrite Asuka 12236
The Asuka (A)‐12236 meteorite has recently been classified as a CM carbonaceous chondrite of petrologic type 3.0/2.9 and is among the most primitive CM meteorites studied to date. Here, we report the
Polycyclic aromatic hydrocarbons and amino acids in meteorites and ice samples from LaPaz Icefield, Antarctica
Abstract— –We have analyzed ice samples and meteorites from the LaPaz region of Antarctica to investigate the composition of polycyclic aromatic hydrocarbons (PAHs) and amino acids with the goal to
Amino acid analyses of Antarctic CM2 meteorites using liquid chromatography‐time of flight‐mass spectrometry
Abstract— Amino acid analyses of the Antarctic CM2 chondrites Allan Hills (ALH) 83100 and Lewis Cliff (LEW) 90500 using liquid chromatography‐time of flight‐mass spectrometry (LC‐ToF‐MS) coupled with
Prebiotic synthesis of adenine and amino acids under Europa-like conditions.
It is found that both adenine and guanine, as well as a simple set of amino acids dominated by glycine, are produced in substantial yields under these conditions, suggesting that the circumstellar zone where life might arise may be wider than previously thought.


Distribution and enantiomeric composition of amino acids in the Murchison meteorite
Early determinations of the amino acid distribution in water extracts of the Murchison meteorite revealed unusual amino acids, including isovaline (Ival), α-aminoisobutyric acid (α-Aiba) and
Amino acids in meteorites.
  • J. Cronin, S. Pizzarello
  • Biology
    Advances in space research : the official journal of the Committee on Space Research
  • 1983
Nonprotein amino acids in the murchison meteorite.
Tentative evidence is presented for the presence of N-methylalanine, N-ethylglycine, beta-aminoisobutyric acid, and norvaline that appear to be extraterrestrial in origin and may provide new evidence for the hypothesis of chemical evolution.
Organic materials in a martian meteorite
THE meteorite EETA 79001, which many believe to have originated on Mars, contains carbonate minerals thought to be martian weathering or alteration products. Accompanying the carbonates are
Extraterrestrial amino acids in Cretaceous/Tertiary boundary sediments at Stevns Klint, Denmark
K/T boundary sediments at Stevns Klint, Denmark, contain both α-amino-isobutyric acid and racemic isovaline, two amino acids that are exceedingly rare on the Earth but which are major amino acids in carbonaceous chondrites, suggesting that an extraterrestrial source is the most reasonable explanation for the presence of these amino acids.
Isotopic evidence for a terrestrial source of organic compounds found in martian meteorites Allan Hills 84001 and Elephant Moraine 79001.
Stepped-heating experiments on martian meteorites Allan Hills 84001 and Elephant Moraine 79001 revealed low-temperature fractions with a carbon isotopic composition delta13C between -22 and -33 per mil and a carbon-14 content that is 40 to 60 percent of that of modern terrestrial carbon, consistent with a terrestrial origin for most of the organic material.
Detecting amino acids on Mars.
A major goal of the NASA Space Explo-ration Program is to search for evidence of abiotic chemistry and extinct or extantlife on Mars, during the next decade, spacecraft will orbit Mars, land on the sur-face, and return with surface samples for analysis.
Isotopic composition of carbonates in the SNC meteorites, Allan Hills 84001 and Zagami
We have measured the 13 C/ 12 C and 14 C/ 12 C ratios in CO 2 released by acid etching of the meteorites Zagami and Allan Hills 84001. We use the 14 C as a label to identify extraterrestrial