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Dynamics of the electron transfer reaction between an oxazine dye and DNA oligonucleotides monitored on the single-molecule level by M Sauer; K.H Drexhage; U Lieberwirth; R Müller; S Nord; C Zander is a Physics and Astronomy article available to read on EtoBox.

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Single-molecule spectroscopy in water has been investigated by monitoring the dynamical behaviour of the electron transfer reaction between guanosine-containing oligonucleotides and the covalently attached oxazine dye MR121, using diode laser based far-field fluorescence microscopy. In this system, each oligonucleotide molecule exhibits multiexponential electron transfer kinetics. The influence of the guanosine position on the degree of quenching is shown using different oligonucleotide sequences. The dynamical behaviour of conformational transitions between various states with different electron transfer efficiency is monitored by time-resolved fluorescence spectroscopy on the msand ms-time scales. In addition, guanosine specific onroff blinking of individual labeled oligonucleotide molecules in aqueous solution is shown.

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Author

M Sauer; K.H Drexhage; U Lieberwirth; R Müller; S Nord; C Zander

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)

Published

1998

Language

EN

Field

Physics and Astronomy (Physical Sciences)