Amphiphile-induced tubular budding of the bilayer membrane
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Amphiphile-induced tubular budding of the erythrocyte membrane was studied using transmission electron microscopy. No chiral patterns of the intramembraneous particles were found, either on the cylindrical buds, or on the tubular nanoexovesicles. In agreement with these observations, the tubular budding may be explained by in-plane ordering of anisotropic membrane inclusions in the buds where the difference between the principal membrane curvatures is very large. In contrast to previously reported theories, no direct external mechanical force is needed to explain tubular budding of the bilayer membrane.
KeywordsTubular budding Amphiphiles Nanotubes Freeze-fracture electron microscopy Deviatoric elasticity
Stimulating discussions with Hans U. Lutz and Sylvio May are gratefully acknowledged. The Åbo Akademy University supported the stay of A.I. at Åbo Akademy University in Åbo/Turku.
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