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Updated: Jun 23, 2026
Preparation of CD4+ T Cells for Analysis of GD3 and GD2 Ganglioside Membrane Expression by Microscopy
Published on: November 8, 2016
A comparative study on ganglioside micelles using electronic energy transfer, fluorescence correlation spectroscopy
Radek Sachl1, Ilya Mikhalyov, Martin Hof
1Department of Chemistry, Biophysical Chemistry, Umeå University, S-901 87, Umeå, Sweden.
Abstract:
Ganglioside (G(M1)) micelles have been studied by means of three different techniques: fluorescence correlation spectroscopy (FCS), electronic energy transfer, as monitored by time-resolved fluorescence spectroscopy, as well as static and dynamic light scattering. The aggregation numbers obtained, 168 +/- 4, remain constant over a wide range of G(M1) concentrations (0.764-156 muM), are very consistent when using different donor-acceptor energy transfer pairs and have served as reference values in tests of the FCS method. It is recommended to calibrate the focal volume by using known dye concentrations. For this the rhodamine dye, 5-TAMRA, turns out to be most suitable. It is also shown that FCS provides correct values of the aggregation numbers, provided that the focal volume is calibrated by using updated values of the diffusion constant of Rhodamine 6G. These results also support recent methodological advances in FCS.
