title: Cell cleavage. Ultrastructural evidence against equatorial stimulation by aster microtubules.
mesh_terms: D000818:Animals; D002455:Cell Division; D005260:Female; D008870:Microtubules / Q000502:physiology* / Q000648:ultrastructure; D008938:Mitosis; D008954:Models, Biological; D010063:Ovum / Q000166:cytology* / Q000648:ultrastructure; D012617:Sea Urchins