title: Ultrastructural studies on the nuclear changes in insufficient-stimulated eggs of the sea urchin.
mesh_terms: D000818:Animals; D002087:Butyrates / Q000494:pharmacology*; D002467:Cell Nucleus / Q000378:metabolism / Q000648:ultrastructure*; D003513:Cycloheximide / Q000494:pharmacology; D004247:DNA / Q000096:biosynthesis; D003609:Dactinomycin / Q000494:pharmacology; D005260:Female; D010063:Ovum / Q000187:drug effects* / Q000378:metabolism / Q000648:ultrastructure*
chemical_list: D002087:Butyrates; D003609:Dactinomycin; D004247:DNA; D003513:Cycloheximide