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Journal of Lipid Research, Vol 25, 1233-1245, Copyright © 1984 by Lipid Research, Inc.

ARTICLES

Micellar properties of glycosphingolipids in aqueous media

B Ulrich-Bott and H Wiegandt

The aggregation properties of neutral glycosphingolipids and gangliosides were investigated by ultracentrifugal sedimentation and gel permeation chromatography. Initially, glycosphingolipids in buffer formed high molecular aggregates. On standing, the glycosphingolipids produced smaller and stable micelles in equilibrium with their monomers at the critical micellar concentration (cmc). The cmc's of monohexaosyl- to tetrahexaosylceramides were on the order of 10(-8) to 10(-7)M. In contrast, values of 10(-8)M for monosialogangliosides and 10(-6)-10(- 5)M for di- and trisialogangliosides were found. From estimations of hydrodynamic radii, Svedberg coefficients, and partial specific volumes, relative masses of glycosphingolipid micelles were calculated to be in the range of 300 to 1000 for the neutral glycosphingolipids and 100 to 350 for the gangliosides.
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