Volume 61, Number 3, February 2003
|Page(s)||409 - 414|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 January 2003|
Flip-flop dynamics in a model lipid bilayer membrane
Departament de Física i Enginyeria Nuclear,
Universitat Politècnica de Catalunya
B5-206 Campus Nord UPC, 08034 Barcelona, Spain
2 Max-Planck-Institut für Kolloid- und Grenzflächenforschung D-14424 Potsdam, Germany
Corresponding author: email@example.com
Accepted: 19 November 2002
The transition states associated to the dynamics of a model lipid bilayer membrane have been investigated by means of molecular-dynamics transition path sampling. We have focused on the flip-flop transition of a lipid molecule between the two sides of a flexible membrane. In the transition state, a local collective reorganization is necessary to allow a lipid molecule to move from one interface of the bilayer to the second one. The elapsed time for flip-flop has been estimated to be 0.27, whereas the increase in configurational energy during the flip-flop transition is of about 15.
PACS: 82.65.+r – Surface and interface chemistry; heterogeneous catalysis at surfaces / 61.20.Ja – Computer simulation of liquid structure / 31.15.Qg – Molecular dynamics and other numerical methods
© EDP Sciences, 2003
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