Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Amino Acid Precursors

  • Kensei Kobayashi
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_63-3

Definition

Amino acid precursors are compounds that give amino acids after some reactions (usually hydrolysis). One of the typical amino acid precursors is aminoacetonitrile, which is converted to glycine by hydrolysis via glycine amide: NH2CH2CN + 2H2O → NH2CH2CONH2 + H2O → NH2CH2COOH + NH3. Hydantoins (substituted glycolylurea) are also typical amino acid precursors and have been found in carbonaceous chondrites. Complex organic polymers with large molecular weights are also possible precursors. Tholins, which are formed by reactions of mixtures of nitrogen and methane, are large complex molecules which give amino acids after hydrolysis. Amino acids are frequently detected in carbonaceous chondrites (meteorites), but the amount of amino acids recovered usually increases after hydrolysis, suggesting that some amino acids are present in the form of amino acid precursors.

See Also

Keywords

Molecular Weight Bioorganic Chemistry Organic Molecule Complex Organic Complex Molecule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Yokohama National UniversityYokohamaJapan