Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1269265 | Bioelectrochemistry | 2007 | 5 Pages |
Abstract
The thermodynamics and kinetics of light-induced electron transfer in bacterial photosynthetic RCs are sensitive to physiologically important lipids (phosphatidylcholine, cardiolipin and phosphatidylglycerol) in the environment. The analysis of the temperature-dependence of the rate of the P+QA−QB→P+QAQB− interquinone electron transfer revealed high enthalpy change of activation in zwitterionic or neutral micelles and vesicles and low enthalpy change of activation in vesicles constituted of negatively charged phospholipids. The entropy change of activation was compensated by the changes of enthalpy, thus the free energy change of activation (≈ 500 meV) did not show large variation in vesicles of different lipids.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Francesco Milano, Márta Dorogi, Kornélia Szebényi, László Nagy, Péter Maróti, György Váró, Livia Giotta, Angela Agostiano, Massimo Trotta,