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The adsorption and reaction of adenine nucleotides on montmorilloniteThe binding of AMP to Zn(2+)-montmorillonite is investigated in the presence of salts and Good's zwitterion buffers, PIPES and MES. The initial concentrations of nucleotide and the percent adsorbtion are used to calculate the adsorption isotherms, and the Langmuir adsorption equation is used for the analysis of data. The adsorption coefficient was found to be three times greater in the presence of 0.2 M PIPES than in its absence. In addition, basal spacings measured by X-ray diffraction were increased by the buffer. These results are interpreted in terms of a model in which the adsorption of AMP is mediated by a Zn(2+) complex of PIPES in different orientations in the interlamellar region of the montmorillonite. Mixed ligand complexes of this type are reminiscent of the complexes observed between metal ions and biological molecules in living systems.
Document ID
19870038543
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ferris, James P.
(Rensselaer Polytechnic Inst. Troy, NY, United States)
Hagan, William J., Jr.
(Rensselaer Polytechnic Institute, Troy, NY, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Origins of Life
Volume: 17
ISSN: 0302-1688
Subject Category
Space Biology
Accession Number
87A25817
Funding Number(s)
CONTRACT_GRANT: NGR-33-018-148
CONTRACT_GRANT: NSF CHE-83-04466
Distribution Limits
Public
Copyright
Other

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