Participation of the nonreducing terminal β‐galactosyl residues of the neutral N‐linked carbohydrate chains of porcine zona pellucida glycoproteins in sperm–egg binding

Abstract excerpt

The zona pellucida (ZP) surrounding the mammalian oocyte is composed of three glycoprotein components (ZPA, ZPB, and ZPC). Mammalian sperm bind to carbohydrate chains of a ZP glycoprotein in the initial phase of fertilization. Sperm-ligand carbohydrate chains have been characterized in mouse, cow, and pig. In pigs, triantennary/tetraantennary neutral complex-type chains from ZPB/ZPC mixture possess stronger...

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