An immunocytochemical localization of th
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Greve, L. Carl ;Hedrick, Jerry L.
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Article
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1978
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Wiley (John Wiley & Sons)
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## Abstract At fertilization, the vitelline envelope surrounding the egg of Xenopus laevis is modified by the addition of an electronβdense component termed the βF layer.β The F layer functions as a block to polyspermy and as a block to the escape of macromolecules from the perivitelline space, the