INVESTIGADORES
DISALVO Edgardo anibal
artículos
Título:
Effect of the asymmetric Ca2+ distribution on the structure sonicated vesicle bilayers
Autor/es:
L.S. BAKAS ; E.A. DISALVO
Revista:
BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 1989 vol. 979 p. 352 - 360
ISSN:
0005-2736
Resumen:
The incorporation of Ca2+ in the inner volume of egg phosphatidylcholine vesicles increases the fluorescence anisotropy of a diphenylhexatriene probe. This increase is higher than for Na+ at the same normality. An effect of the same magnitude is induced by Ca2+ when using binary lipid mixture (dioleoylphosphatidylcholine and dipalmitoylphosphatidylcholine) as long as the mixture is maintained below the phase-transition temperature of the saturated specie. The influence of Ca2+ may be explained by an asymmetricdistribution of the saturated and unsaturated lipids between the internal and the external monolayers.
