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Effect of the electronic coupling in dinucleotides and oligonucleotides of adenine and thymine from synchrotron radiation absorption and circular dichroism

Paper ID Volume ID Publish Year Pages File Format Full-Text
29144 44124 2008 5 PDF Available
Title
Effect of the electronic coupling in dinucleotides and oligonucleotides of adenine and thymine from synchrotron radiation absorption and circular dichroism
Abstract

Absorption and circular dichroism measurements were performed on specifically chosen DNA mononucleotides, dinucleotides and oligonuclotides with combinations of adenine (A) and thymine (T), namely 2′-deoxyadenosine 5′-monophosphate (dAMP), thymidine 5′-monophosphate (TMP), dApdA, dTpdT, dApdT, dTpdA and dAp(dTp)ndA (n = 1, 2 or 3) to study the importance of electronic coupling between bases for various bands. The coupling is stronger in the VUV region than in the UV region. In the VUV, it is possible to distinguish between dApdT and dTpdA sequences whereas in the UV the spectra are almost identical. A simple sequence dependent nearest neighbour model is used to explain the observations from both types of spectroscopy, underlining the importance of not only the nature of nearest neighbour nucleobases but the sequence as well.

Keywords
Synchrotron radiation; Circular dichroism; Absorption spectroscopy; Vacuum ultraviolet; Exciton coupling
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Effect of the electronic coupling in dinucleotides and oligonucleotides of adenine and thymine from synchrotron radiation absorption and circular dichroism
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 197, Issue 1, 10 June 2008, Pages 110–114
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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