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Fungal Peptaibiotics: Assessing Potential Meteoritic Amino Acid ContaminationThe presence of non-protein alpha-dialkyl-amino acids such as alpha-aminoisobutyric acid (alpha-A1B) and isovaline (Iva), which are relatively rare in the terrestrial biosphere, has long been used as an indication of the indigeneity of meteoritic amino acids, however, the discovery of alpha-AIB in peptides producers by a widespread group of filamentous fungi indicates the possibility of a terrestrial biotic source for the alpha-AIB observed in some meteorites. The alpha-AIB-containing peptides produced by these fungi are dubbed peptaibiotics. We measured the molecular distribution and stable carbon and nitrogen isotopic ratios for amino acids found in the total hydrolysates of four biologically synthesized peptaibiotics. We compared these aneasurenetts with those from the CM2 carbonaceous chondrite Murchison and from three Antarctic CR2 carbonaceous chondrites in order to understand the peptaibiotics as a potential source of meteoritic contamination.
Document ID
20100031174
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Elsila, J. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Callahan, M. P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Glavin, D. P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Dworkin, J. P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bruckner, H.
(Giessen Univ. Germany)
Date Acquired
August 25, 2013
Publication Date
July 25, 2010
Subject Category
Lunar And Planetary Science And Exploration
Meeting Information
Meeting: 73th Annual Meteoritical Society Meeting
Location: New York, NY
Country: United States
Start Date: July 26, 2010
End Date: July 30, 2010
Sponsors: American Museum of Natural History, City Univ. of New York
Distribution Limits
Public
Copyright
Public Use Permitted.
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