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- W2046787676 abstract "We studied the organization of the egg of a freshwater bivalve, Unio elongatulus. This egg is markedly polarized. At the vegetal pole there is a crater which constitutes the point of attachment of the growing oocyte to the ovarian wall. This has previously been interpreted as a micropyle. We show that the sperm does not enter the egg through the crater but in a differentiated region around it, mostly at its base. This region is characterized by a wrinkled surface and is the only site of the vitelline coat which specifically binds the lectin from Lotus tetragonolobus. The egg reacts explosively upon fertilization, ejecting vacuolar material from the crater. The role of this “egg reaction” in relation to the prevention of polyspermy is discussed." @default.
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- W2046787676 date "1988-06-01" @default.
- W2046787676 modified "2023-10-10" @default.
- W2046787676 title "Polarized site of sperm entrance in the egg of a freshwater bivalve, Unio elongatulus" @default.
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- W2046787676 doi "https://doi.org/10.1016/0012-1606(88)90330-2" @default.
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