title: Polyspermic fertilization of sea urchin eggs treated with protease inhibitors: localization of sperm receptor sites at the egg surface.
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005260:Female; D005306:Fertilization / Q000187:drug effects*; D007976:Leupeptins / Q000494:pharmacology; D008297:Male; D010063:Ovum / Q000187:drug effects / Q000648:ultrastructure*; D012617:Sea Urchins; D013094:Spermatozoa; D014361:Trypsin Inhibitors / Q000494:pharmacology; D014817:Vitelline Membrane / Q000648:ultrastructure
chemical_list: D004791:Enzyme Inhibitors; D007976:Leupeptins; D014361:Trypsin Inhibitors