Physics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..379....5e&link_type=abstract
Physical orgin of homochirality in life. AIP Conference Proceedings, Volume 379, pp. 5-6 (1996).
Physics
Structure And Bonding, Constitution
Scientific paper
A SIGNIFICANT parties of prebiotic organic matter on the early Earth may have been introduced by carbonaceous asteroids and comets.1 The distribution and stable-isotope composition of individual organic compounds in carbonaceous meteorites, which are thought to be derived from asteroidal parent bodies, may therefore provide important information concerning mechanistic pathways for prebiotic synthesis2 and the composition of organic matter on Earth before living systems developed.3 Previous studies11,12 have shown that meteorite amino acids are enriched in 13C relatives to their terrestrial counterparts, but individual species were not distinguished. Here we report the 13C contents of individual amino acids in the Murchison meteorite. The amino acids are enriched in 13C, indicating an extraterrestrial origin. Alanine is not racemic, and the 13C enrichment of its D- and L-enantiomers implies that the excess of the L-enantiomer is indigenous rather than terrestrial contamination, suggesting that optically active materials were present in the early Solar System before life began.
Engel Michael H.
Macko Stephen A.
Silter J. A.
No associations
LandOfFree
Carbon isotope composition of individual amino acids in the Murchison meteorite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Carbon isotope composition of individual amino acids in the Murchison meteorite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbon isotope composition of individual amino acids in the Murchison meteorite will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1115496