title: Onset of nucleolus organizer activity in early mouse embryogenesis and evidence for its regulation.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000378:metabolism*; D002467:Cell Nucleus / Q000378:metabolism; D002875:Chromosomes / Q000378:metabolism*; D003513:Cycloheximide / Q000494:pharmacology; D003609:Dactinomycin / Q000494:pharmacology; D004622:Embryo, Mammalian / Q000648:ultrastructure*; D005260:Female; D051379:Mice; D009865:Oocytes / Q000648:ultrastructure; D012335:RNA, Ribosomal / Q000096:biosynthesis*
chemical_list: D012335:RNA, Ribosomal; D003609:Dactinomycin; D003513:Cycloheximide