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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Simulation of processes in cellular membranes
 Timr, Štěpán ; Jungwirth, Pavel (advisor) ; Pittner, Jiří (referee)
Probing orientations of fluorescent molecules embedded in or attached to cell membranes has a great potential to reveal information on membrane structure and processes occurring in living cells. In this thesis, we first describe one- and two-photon linear dichroism measurements on a fluorescent probe embedded in a phospholipid membrane with a well- defined lipid composition. On the basis of experimental data, we determine the distribution of the angle between the one-photon transition dipole moment of the probe and the membrane normal. At the same time, we perform molecular dynamics simulations of the fluorescent probe and quantum calculations of its one-photon and two-photon absorption properties. By comparing the orientational distribution gained from experiments with that predicted by simulations, we test the ability of linear dichroism measurements to report on the orientation of a fluorescent molecule in a lipid membrane. We also examine the applicability of molecular simulations as a basis for the interpretation of experimental data.
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