title: Sea urchin fertilization envelope: uncoupling of cortical granule exocytosis from envelope assembly and isolation of an envelope intermediate from Strongylocentrotus purpuratus embryos.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004447:Echinodermata; D005089:Exocytosis; D005260:Female; D005306:Fertilization; D008274:Magnesium / Q000494:pharmacology; D008297:Male; D012617:Sea Urchins; D013084:Sperm-Ovum Interactions; D014817:Vitelline Membrane / Q000187:drug effects / Q000648:ultrastructure*
chemical_list: D008274:Magnesium; D002118:Calcium