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- W2768177169 abstract "The dynamics and organization of lipid bilayers, whether they are artificial supported lipid bilayers, lipid vesicles or cell membranes, still pose an enigma. Especially bilayers with multiple lipid components, not to mention peptides and proteins, are difficult to characterize as they often exhibit fast molecular dynamics and structural organization that presumably are on the nanometer scale. Therefore, biophysical techniques are required that measure sufficiently fast to detect molecular movements and interactions but also provide information about structures below the optical diffraction limit. Imaging Fluorescence Correlation Spectroscopy (Imaging FCS) fulfils these conditions and can resolve membrane dynamics with high temporal resolution and provide information even on nanoscopic scales. Compared to conventional confocal FCS, this multiplexed modality can record over hundreds of contiguous points simultaneously on the membrane. In this chapter, we present briefly the theory of Imaging FCS and provide general guidelines for its implementation. This is followed by a description of multiple options to analyse the Imaging FCS data. We discuss the FCS diffusion law to investigate the membrane organization below the optical diffraction limit, the difference in cross-correlation function (ΔCCF) to investigate anisotropies in diffusion, Imaging Fluorescence Cross-correlation (Imaging FCCS) to study interactions, and the recovery of the Arrhenius activation energy of diffusion to determine lipid packing and phases. Lastly, we give a short overview of recent applications of Imaging FCS." @default.
- W2768177169 created "2017-12-04" @default.
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- W2768177169 date "2017-01-01" @default.
- W2768177169 modified "2023-09-26" @default.
- W2768177169 title "Investigating the Dynamics and Organization of Membrane Proteins and Lipids by Imaging Fluorescence Correlation Spectroscopy" @default.
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- W2768177169 doi "https://doi.org/10.1007/978-3-319-66601-3_6" @default.
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