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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1979 Dec;76(12):6439–6442. doi: 10.1073/pnas.76.12.6439

Endothelial plasmalemmal vesicles as elements in a system of branching invaginations from the cell surface.

M Bundgaard, J Frøkjaer-Jensen, C Crone
PMCID: PMC411880  PMID: 316540

Abstract

In electron microscopy studies of the endothelial vesicles in frog mesenteric capillaries, an accidental observation was made concerning vesicular organization. When tannic acid was added to already fixed tissue, the mordant reached apparently free vesicles in the cytoplasm under conditions in which vesicular movement was excluded and in which the impermeability of the cell membranes was preserved. This indicates a spatial continuity between the vesicles and the cell exterior. It is proposed that cytoplasmic vesicles in endothelial cells are elements of branching, permanent or semipermanent invaginations of the plasmalemma.

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Selected References

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