title: Sperm proteinase release during fertilization of rabbit ova.
abstract: Proteinase activity was found to be present along the sides of sperm penetration tunnels through the zonae pellucidae of rabbit ova using silver-proteinate staining techniques. This is the first direct confirmation of the generally accepted concept of sperm penetration by proteinase release and digestion of the zona pellucida.
mesh_terms: D000176:Acrosin / Q000378:metabolism*; D000818:Animals; D010450:Endopeptidases / Q000378:metabolism*; D005260:Female; D005306:Fertilization; D006651:Histocytochemistry; D008297:Male; D010063:Ovum / Q000201:enzymology; D011817:Rabbits; D013094:Spermatozoa / Q000201:enzymology*
chemical_list: D010450:Endopeptidases; D000176:Acrosin