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The role of metal ions in chemical evolution - Polymerization of alanine and glycine in a cation-exchanged clay environmentThe effect of the exchangeable cation on the condensation of glycine and alanine was investigated using a series of homoionic bentonites. A cycling procedure of drying, warming and wetting was employed. Peptide bond formation was observed, and the effectiveness of metal ions to catalyze the condensation was Cu(2+) greater than Ni(2) approximately equals Zn(2+) greater than Na(+). Glycine showed 6% of the monomer incorporated into oligomers with the largest detected being the pentamer. Alanine showed less peptide bond formation (a maximum of 2%) and only the dimer was observed.
Document ID
19800052025
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lawless, J. G.
(NASA Ames Research Center Moffett Field, CA, United States)
Levi, N.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
November 1, 1979
Publication Information
Publication: Journal of Molecular Evolution
Volume: 13
Subject Category
Space Biology
Accession Number
80A36195
Distribution Limits
Public
Copyright
Other

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