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4 April, 23:35

What causes formation of the fertilization envelope?

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  1. 5 April, 00:01
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    Sperm-egg interaction

    Explanation:

    The formation of fertilization envelope is well-studied on the model system - sea urchin. It has been shown that, the fertilization envelope is formed after the initial sperm-egg interaction from the egg surface vitelline envelope and the paracrystalline protein fraction which is derived from cortical granules. Secretion from cortical granules, prevents polyspermy.
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