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Interaction between ATP, metal ions, glycine, and several mineralsInteractions between ATP, glycine and montmorillonite and kaolinite clay minerals in the presence of various metal cations are investigated. The adsorption of adenine nucleotides on clays and Al(OH)3 was measured as a function of pH, and glycine condensation was followed in the presence of ATP, ZnCl2, MgCl2 and either kaolinite or montmorillonite. The amounts of ATP and ADP adsorbed are found to decrease with increasing Ph, and to be considerably enhanced in experiments with Mg(2+)- and Zn(2+)-montmorillonite with respect to Na(+)-montmorillonite. The effects of divalent cations are less marked in kaolinite. Results for Al(OH)3 show the importance of adsorption at clay platelet edges at high pH. The decomposition of ATP during drying at high temperature is observed to be inhibited by small amounts of clay, vacuum, or Mg(2+) or Zn(2+) ions, and to be accompanied by peptide formation in the presence of glycine. Results suggest the importance of Zn(2+) and Mg(2+) in chemical evolution.
Document ID
19820049748
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Rishpon, J.
(NASA Ames Research Center Moffett Field, CA, United States)
Ohara, P. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Lawless, J. G.
(NASA Ames Research Center Moffett Field, CA, United States)
Lahav, N.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 10, 2013
Publication Date
May 1, 1982
Publication Information
Publication: Journal of Molecular Evolution
Volume: 18
Subject Category
Space Biology
Accession Number
82A33283
Distribution Limits
Public
Copyright
Other

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