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. 1971 Feb;68(2):486-90.
doi: 10.1073/pnas.68.2.486.

Nonprotein amino acids in the murchison meteorite

K A Kvenvolden  1 , J G Lawless, C Ponnamperuma
Affiliations

Nonprotein amino acids in the murchison meteorite

K A Kvenvolden et al. Proc Natl Acad Sci U S A. 1971 Feb.

Abstract

Twelve nonprotein amino acids appear to be present in the Murchison meteorite. The identity of eight of them has been conclusively established as N-methylglycine, beta-alanine, 2-methylalanine, alpha-amino-n-butyric acid, beta-amino-n-butyric acid, gamma-amino-n-butyric acid, isovaline, and pipecolic acid. Tentative evidence is presented for the presence of N-methylalanine, N-ethylglycine, beta-aminoisobutyric acid, and norvaline. These amino acids appear to be extraterrestrial in origin and may provide new evidence for the hypothesis of chemical evolution.

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