title: Fine structure of the nucleolus in normal and mutant Xenopus embryos.
mesh_terms: D000818:Animals; D001001:Anura / Q000196:embryology*; D002455:Cell Division; D002466:Cell Nucleolus; D002875:Chromosomes / Q000032:analysis; D004625:Embryo, Nonmammalian / Q000166:cytology; D005314:Embryonic and Fetal Development; D005855:Germ Layers; D006651:Histocytochemistry; D006652:Histological Techniques; D008854:Microscopy, Electron; D009154:Mutation; D009696:Nucleic Acids / Q000032:analysis; D012313:RNA / Q000032:analysis*; D012335:RNA, Ribosomal / Q000096:biosynthesis; D012260:Ribonucleases; D012270:Ribosomes / Q000378:metabolism; D013194:Staining and Labeling
chemical_list: D009696:Nucleic Acids; D012335:RNA, Ribosomal; D012313:RNA; D012260:Ribonucleases