Abstract

Cell-sized bilayer liposomes have been visualized directly in the electron microscope by a thin section method. Fixation in lanthanum nitrate plus potassium permanganate has made this visualization possible. Trilamellar images were seen in thin sections of the fixed liposomes; measurements made from microdensitometer tracings revealed a thickness (peak-to-peak distance) ranging from 25.3 to 55.3 A. The mean peak-to-peak distance of 35.6 +/- 8.2 A (+/- S.D.) was in good agreement with the value obtained by Robertson from typical myelin figures.

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