title: Physiological changes in the postnuclear cap region of mammalian spermatozoa: a necessary preliminary to the membrane fusion between sperm and egg cells.
mesh_terms: D000818:Animals; D002462:Cell Membrane; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D006224:Cricetinae; D005260:Female; D005306:Fertilization; D006821:Hyaluronoglucosaminidase / Q000494:pharmacology; D008297:Male; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D010063:Ovum / Q000187:drug effects; D013094:Spermatozoa / Q000502:physiology*; D014357:Trypsin / Q000494:pharmacology
chemical_list: D006063:Chorionic Gonadotropin; D006821:Hyaluronoglucosaminidase; D014357:Trypsin