Practice question
Question
Which of the following is the glycoprotein layer surrounding oocyte?
Explanation
Zona pellucida is translucent extracellular matrix composed of ZP1, ZP2, ZP3 sulfated glycoproteins surrounding mammalian oocyte inside cumulus. It mediates species-specific sperm binding, triggers acrosome reaction, blocks polyspermy and protects preimplantation embryo until hatching.
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