Cleavage furrow: calcium as determinant of site.
D000818:Animals; D002118:Calcium / Q000502:physiology*; D002455:Cell Division / Q000187:drug effects; D004492:Edetic Acid / Q000008:administration & dosage / Q000494:pharmacology; D005260:Female; D008722:Methods; D010063:Ovum / Q000187:drug effects / Q000254:growth & development*; D012617:Sea Urchins; D013997:Time Factors
D004492:Edetic Acid; D002118:Calcium