title: Differences in the fine structure and chemical constitution of nucleolar bodies and the true nucleolus in Xenopus laevis embryos.
mesh_terms: D000818:Animals; D001001:Anura; D002466:Cell Nucleolus; D005260:Female; D006651:Histocytochemistry; D008854:Microscopy, Electron; D010063:Ovum / Q000032:analysis / Q000166:cytology; D011506:Proteins / Q000032:analysis; D012313:RNA / Q000032:analysis; D014981:Xenopus / Q000196:embryology*
chemical_list: D011506:Proteins; D012313:RNA