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Measurement of the lateral diffusion coefficients of ubiquinones in lipid vesicles by fluorescence quenching of 12‐(9‐anthroyl)stearate
Author(s) -
Fato Romana,
Battino Maurizio,
Castelli Giovanna Parenti,
Lenaz Giorgio
Publication year - 1985
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(85)80526-3
Subject(s) - vesicle , stearate , quenching (fluorescence) , diffusion , chemistry , lipid bilayer , phospholipid , fluorescence , bilayer , analytical chemistry (journal) , lateral diffusion , chromatography , organic chemistry , membrane , biochemistry , thermodynamics , optics , physics
The lateral diffusion coefficients of some ubiquinone homologues have been measured in phospholipid vesicles exploiting the fluorescence quenching of the probe 12‐(9‐anthroyl)stearate by the quinones. Diffusion coefficients higher than 10 −6 cm 2 · s −1 have been found at 25°C, compatible with the localization of the ubiquinones in the low‐viscosity midplane region of the bilayer.