What is the zona pellucida composed of?
What is the zona pellucida composed of? glycoproteins The zona pellucida is an extracellular matrix composed of three glycoproteins: ZP1, ZP2, and ZP3. Receptors on the sperm plasma membrane attach to ZP3. Binding to ZP3 allows the sperm to adhere to the zona pellucida and is a critical step in fertilization. What is the structure […]