Summary
Cytoplasmic structures consisting of two loops of “unit membrane” connected by a region of straight or curved 7-layered membrane are described. It is suggested that this appearance is caused by the collapse of a vesicle lined with a thin coating of electron-dense material.
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References
Dyer, R. F., Ruby, J. R., Skalko, R. G.: Ultrastructural observations on membranous structures in developing mouse oocytes. Z. Zellforsch.137, 159–166 (1973)
Weakley, B. S.: Electron microscopy of the oocyte and granulosa cells in the developing ovarian follicles of the golden hamster (Mesocricetus auratus). J. Anat. (Lond.)100, 503–534 (1966)
Weakley, B. S.: Comparison of cytoplasmic lamellae and membraneous elements in the oocytes of five mammalian species. Z. Zellforsch.85, 109–123 (1968)
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Weakley, B.S. Further observations on a cytoplasmic structure in the hamster oocyte. Z.Zellforsch 146, 517–523 (1973). https://doi.org/10.1007/BF02347180
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DOI: https://doi.org/10.1007/BF02347180