title: Hydrolysis of the hen's perivitelline layer by cock sperm in vitro.
mesh_terms: D000818:Animals; D002645:Chickens / Q000502:physiology*; D005260:Female; D005306:Fertilization; D006868:Hydrolysis; D066298:In Vitro Techniques; D008297:Male; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology*; D014817:Vitelline Membrane / Q000502:physiology* / Q000648:ultrastructure