
Keywords: ZP، منطقه کوچک; ZP, zona pellucida; NK, natural killer; SRS, species recognition system; EBP, egg binding protein; SLEX, sialyl-Lewisx; MS, mass spectrometry; HZA, hemizona assay; Cer, ceramideZona pellucida; Fertilization; Oligosaccharide; Acrosomal exocytosis; Species