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哺乳动物卵透明带 (zona pellucida,ZP)是由卵母细胞及颗粒细胞分泌并覆盖于卵母细胞及着床前受精卵外的一层基质 ,人和许多动物包括猪、鼠、兔等在内的 ZP都是由 3～ 5种糖蛋白组成 ,称为 ZP1、ZP2、ZP3等。ZP蛋白在精卵结合及精子穿透卵透明带中起着非常重要的作用 ,影响受精
Zona pellucida (ZP) is a matrix secreted by oocytes and granulocytes and covers the oocyte and the preimplantation fertilized egg. Many animals, including pigs, mice and rabbits Within the ZP are composed of 3 to 5 kinds of glycoproteins, known as ZP1, ZP2, ZP3 and so on. ZP protein plays a very important role in sperm-egg binding and sperm penetration in zona pellucida, affecting fertilization