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Structure of 2,4-Diaminopyrimidine - Theobromine Alternate Base PairsWe report the structure of clusters of 2,4-diaminopyrimidine with 3,7-dimethylxanthine (theobromine) in the gas phase determined by IR-UV double resonance spectroscopy in both the near-IR and mid-IR regions in combination with ab initio computations. These clusters represent potential alternate nucleobase pairs, geometrically equivalent to guanine-cytosine. We have found the four lowest energy structures, which include the Watson-Crick base pairing motif. This Watson-Crick structure has not been observed by resonant two-photon ionization (R2PI) in the gas phase for the canonical DNA base pairs.
Document ID
20120011783
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gengeliczki, Zsolt (Stanford Univ. Stanford, CA, United States)
Callahan, Michael P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kabelac, Martin (University of South Bohemia Budejovice, Czech Republic)
Rijs, Anouk M. (FOM lnstitute for Plasma Physics Rijnhuizen Nieuwegein, Netherlands)
deVries, Mattanjah S. (California Univ. Santa Barbara, CA, United States)
Date Acquired
August 26, 2013
Publication Date
September 2, 2011
Publication Information
Publication: The Journal of Physical Chemistry A
Volume: 115
Issue: 41
Subject Category
Inorganic, Organic and Physical Chemistry
Report/Patent Number
GSFC.JA.00140.2012
Funding Number(s)
CONTRACT_GRANT: MOE-LC512
CONTRACT_GRANT: NSF CHE-0911564
CONTRACT_GRANT: IAA4005S0808
Distribution Limits
Public
Copyright
Other