
Sea Urchin Fertilization Direct Binding of Sperm to Egg
Isolated Zona Pellucida Blocks Sperm Binding + ZP (2 cell) + ZP
Gal Gal NAcGlc NAcGlc NAcGlc NAcGlc Man Man Man Man Man Man O-linked Oligosaccharide O-linked Oligosaccharide Galactosyl Transferase + 2UDP-Gal Galactosyl Transferase