title: Symmetrization in the amphibian egg by disrupted sperm cells.
mesh_terms: D000818:Animals; D002022:Bufo arenarum; D002474:Cell-Free System; D005260:Female; D008297:Male; D010063:Ovum / Q000502:physiology*; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000502:physiology*