First-principles study of muonium in A- and B-form DNA

    Authors

    R. H. Scheicher; T. P. Das; E. Torikai; F. L. Pratt;K. Nagamine

    Comments

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    Abbreviated Journal Title

    Physica B

    Keywords

    first-principles calculations; muon spin relaxation; DNA; Physics, Condensed Matter

    Abstract

    We have carried out a systematic first-principles study of muonium (mu(+)e(-)) adducts in A- and B-form DNA. Potential trapping sites in the bases cytosine and thymine were considered. Our results indicate that the difference in structural geometry between A- and B-form DNA can lead to substantial deviations in the hyperfine fields at the mu(+) sites. This could have important implications for the interpretation of muon spin relaxation measurements that have shown evidence for an enhanced electron mobility in A-form DNA, but implicitly assume a negligible difference in the magnitude of the hyperfine fields at the trapped mu(+) site between A- and B-form DNA. (c) 2005 Elsevier B.V. All rights reserved.

    Journal Title

    Physica B-Condensed Matter

    Volume

    374

    Publication Date

    1-1-2006

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    448

    Last Page

    450

    WOS Identifier

    WOS:000236388800116

    ISSN

    0921-4526

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