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@string{mp = {Mol. Phys.}} |
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@string{pccp = {Phys. Chem. Chem. Phys.}} |
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@string{pnas = {Proc. Natl. Acad. Sci. USA}} |
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@string{pra = {Phys. Rev. A}} |
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@string{rmp = {Rev. Mod. Phys.}} |
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@string{pccp = {Phys. Chem. Chem. Phys.}} |
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@article{Benninger:2005qy, |
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Abstract = {The plasma membrane of cells is an ordered environment, giving rise to anisotropic orientation and restricted motion of molecules and proteins residing in the membrane. At the same time as being an organized matrix of defined structure, the cell membrane is heterogeneous and dynamic. Here we present a method where we use fluorescence imaging of linear dichroism to measure the orientation of molecules relative to the cell membrane. By detecting linear dichroism as well as fluorescence anisotropy, the orientation parameters are separated from dynamic properties such as rotational diffusion and homo energy transfer (energy migration). The sensitivity of the technique is enhanced by using two-photon excitation for higher photo-selection compared to single photon excitation. We show here that we can accurately image lipid organization in whole cell membranes and in delicate structures such as membrane nanotubes connecting two cells. The speed of our wide-field imaging system makes it possible to image changes in orientation and anisotropy occurring on a subsecond timescale. This is demonstrated by time-lapse studies showing that cholesterol depletion rapidly disrupts the orientation of a fluorophore located within the hydrophobic region of the cell membrane but not of a surface bound probe. This is consistent with cholesterol having an important role in stabilizing and ordering the lipid tails within the plasma membrane. }, |
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Annote = {10.1529/biophysj.104.050096}, |
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Author = {Benninger, Richard K. P. and Onfelt, Bjorn and Neil, Mark A. A. and Davis, Daniel M. and French, Paul M. W.}, |
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Date-Added = {2007-10-30 11:44:02 -0400}, |
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Date-Modified = {2007-10-30 11:44:02 -0400}, |
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Journal = {Biophysical Journal}, |
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Journal1 = {Biophys. J.}, |
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Number = {1}, |
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Pages = {609--622}, |
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Title = {Fluorescence Imaging of Two-Photon Linear Dichroism: Cholesterol Depletion Disrupts Molecular Orientation in Cell Membranes}, |
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Ty = {JOUR}, |
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Url = {http://www.biophysj.org/cgi/content/abstract/88/1/609}, |
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Volume = {88}, |
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Year = {2005}} |
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@article{NorbertKucerka06012006, |
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Abstract = {X-ray data are presented for the benchmark dipalmitoylphosphatidylcholine lipid bilayer in the most biologically relevant state in which the bilayers are fully hydrated and in the fluid (liquid-crystalline) phase. Form factors F(qz) are obtained from a combination of two sample preparations, oriented stacks of bilayers for qz extending to 0.85 A-1 and unilamellar vesicles for smaller qz. Modeling obtains the electron density profile and values for the area per molecule, for the locations of the component groups, and for the different types of thicknesses of the bilayer, such as the hydrocarbon thickness and the steric thickness. |
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Year = 2006} |
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@article{Kranenburg2005, |
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author = {Marieke Kranenburg and Berend Smit}, |
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title = {Phase Behavior of Model Lipid Bilayers}, |
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journal = {jpcb}, |
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year = 2005, |
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volume = 109, |
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pages = {6553-6563} |
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} |
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Author = {Marieke Kranenburg and Berend Smit}, |
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Journal = jpcb, |
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Pages = {6553-6563}, |
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Title = {Phase Behavior of Model Lipid Bilayers}, |
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Volume = 109, |
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Year = 2005} |
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@article{Sparrman2003, |
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author = {Tobias Sparrman and Per-Olof Westlund}, |
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title = {An NMR line shape and relaxation analysis of heavy water powder spectra of the $L_\alpha$, $L_{\beta'}$ and $P_{\beta'}$ phases in the DPPC/water system}, |
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journal = {pccp}, |
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year = 2003, |
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volume = 5, |
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pages = {2114-2121} |
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} |
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Author = {Tobias Sparrman and Per-Olof Westlund}, |
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Journal = pccp, |
| 2790 |
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Pages = {2114-2121}, |
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Title = {An NMR line shape and relaxation analysis of heavy water powder spectra of the $L_\alpha$, $L_{\beta'}$ and $P_{\beta'}$ phases in the DPPC/water system}, |
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Volume = 5, |
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Year = 2003} |
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@article{Tenchov2001, |
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author = {Boris Tenchov and Rumiana Koynova and Gert Rapp}, |
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title = {New Ordered Metastable Phases between the Gel and Subgel Phases in Hydrated Phospholipids}, |
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journal = {bj}, |
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year = 2001, |
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volume = 80, |
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pages = {1873-1890} |
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} |
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Author = {Boris Tenchov and Rumiana Koynova and Gert Rapp}, |
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Journal = bj, |
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Pages = {1873-1890}, |
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Title = {New Ordered Metastable Phases between the Gel and Subgel Phases in Hydrated Phospholipids}, |
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Volume = 80, |
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Year = 2001} |
