Multiparameter single molecule spectroscopy gives insight into the complex photophysics of fluorescence energy transfer (FRET) coupled biosystems

Schleifenbaum, F. and Blum, C. and Elgass, K. and Peter, S. and Subramaniam, V. and Meixner, A.J. (2009) Multiparameter single molecule spectroscopy gives insight into the complex photophysics of fluorescence energy transfer (FRET) coupled biosystems. In: Reporters, Markers, Dyes, Nanoparticles, and Molecular Probes for Biomedical Applications. Proceedings of SPIE, 7190 . SPIE, 71900U. ISBN 9780819474360

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Abstract:	Since the discovery of the technique in the early 1990s, single molecule spectroscopy has been used as a powerful tool to investigate and characterize fluorescent molecules, revealing insights into molecular behavior far beyond the information content that can be obtained by conventional ensemble studies. Several spectroscopic techniques have been established at the single molecule level, including spectrally resolved fluorescence, fluorescence lifetime investigations, or single molecule Raman measurements. However, the combination of two or more of these spectroscopies applied to the same individual molecule in multiparameter approaches yields a deeper understanding of molecular systems. In this contribution, we present our results of combined spectrally- and time-resolved fluorescence microscopy of the intrinsic fluorescence energy transfer (FRET) system of the red fluorescent protein DsRed. Correlating the results obtained from the two spectroscopic techniques, we are able to determine all relevant parameters to describe the energy transfer processes within the DsRed system without any further assumptions. We further discuss fluorescence and surface enhanced Raman scattering (SERS) spectroscopy of the same individual DsRed unit, which can help to propose mechanisms for photodegeneration of the distinct chromophores involved
Item Type:	Book Section
Copyright:	© 2009 COPYRIGHT SPIE--The International Society for Optical Engineering
Faculty:	Science and Technology (TNW)
Research Group:	Nano-Biophysics (NBP)
Link to this item:	http://purl.utwente.nl/publications/78009
Official URL:	http://dx.doi.org/10.1117/12.809298
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