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Titolo:
KINETICS OF THE SOLUBILIZATION OF STYRYL DYE AGGREGATES BY LIPID VESICLES
Autore:
ZOUNI A; CLARKE RJ; HOLZWARTH JF;
Indirizzi:
MAX PLANCK GESELL,FRITZ HABER INST,FARADAYWEG 4-6 D-14195 BERLIN GERMANY MAX PLANCK GESELL,FRITZ HABER INST D-14195 BERLIN GERMANY
Titolo Testata:
Journal of physical chemistry
fascicolo: 6, volume: 98, anno: 1994,
pagine: 1732 - 1738
SICI:
0022-3654(1994)98:6<1732:KOTSOS>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARGE-SHIFT PROBES; SYNAPTIC POTENTIALS; OPTICAL PROBES; SENSITIVE DYE; PH INDICATORS; CYANINE DYES; MEMBRANES; TRANSLOCATION; BINDING; BACTERIORHODOPSIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
A. Zouni et al., "KINETICS OF THE SOLUBILIZATION OF STYRYL DYE AGGREGATES BY LIPID VESICLES", Journal of physical chemistry, 98(6), 1994, pp. 1732-1738

Abstract

The interaction of the potential-sensitive styryl dye RH421 with dimyristoylphosphatidylcholine vesicles has been investigated above and below the gel-liquid crystal-phase transition temperature by the fluorescence stopped-flow method. The observed kinetic behavior is consistentwith a disaggregation of dye aggregates in the aqueous solution and the incorporation of dye monomers into the vesicle membrane. Upon incorporation the dye undergoes a decrease in its pK(a) of over 2 pH units. This can be attributed to the change of the electronic environment ofthe dye. The magnitude of the pK(a) shift is discussed in terms of the local membrane dielectric constant, the dipole potential, and possible dye reorientation, which may all affect the free energy change of the protonation reaction.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 08:12:20