PMID: 3754764Apr 8, 1986Paper

Anisotropy decay associated fluorescence spectra and analysis of rotational heterogeneity. 2. 1,6-Diphenyl-1,3,5-hexatriene in lipid bilayers

Biochemistry
L DavenportL Brand

Abstract

The application of a new spectroscopic tool [Knutson, J. R., Davenport, L., & Brand, L. (1986) Biochemistry (preceding paper in this issue)] for studying rotational microheterogeneity of probe location in lipid bilayer systems is described. Anisotropy decay associated spectra are derived from experimentally obtained polarized emission components. "Early" difference spectra (IV - IH) contain contributions from both fast and slow rotors, while "late" difference spectra predominantly reflect the emission from slowly rotating fluorophores. Anisotropy decay associated spectra have been used to resolve the emission spectra of 1,6-diphenyl-1,3,5-hexatriene (DPH) imbedded within a known rotationally heterogeneous mixture of two vesicle types (L-alpha-dimyristoyllecithin and L-alpha-dipalmitoyllecithin). At 29 degrees C, diphenylhexatriene within pure dimyristoyllecithin vesicles rotates rapidly, with a small r infinity, while diphenylhexatriene in dipalmitoyllecithin vesicles exhibits a large r infinity. Spectra for diphenylhexatriene imbedded in the two vesicle types show small but significant spectral differences. A spectrum of a mixture of the two vesicle types with DPH lies between these characteristic component spectra. The spectr...Continue Reading

References

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Citations

Mar 1, 1995·Journal of Fluorescence·L Davenport, P Targowski
Mar 1, 1995·Journal of Fluorescence·D Toptygin, L Brand
Sep 1, 1987·Biophysical Chemistry·H SzmacinskiJ R Lakowicz
Mar 1, 1987·Analytical Biochemistry·D G WalbridgeL Brand
Nov 14, 1997·Analytical Biochemistry·M M Krishna, N Periasamy

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