title: [Ultrastructural modification of nucleoli in the intestinal epithelium of the rat].
abstract: Nucleolar ultrastructure has been studied in absorptive cells of the intestinal villi and in undifferentiated cells of the crypts of Lieberkühn. In the top of the villi, the nucleoli are composed of fibrillar centres associated with dense chromatin. These observations seem to be related to RNA synthesis inhibition.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure*; D002843:Chromatin / Q000648:ultrastructure; D004848:Epithelium / Q000648:ultrastructure; D007413:Intestinal Mucosa / Q000648:ultrastructure*; D007583:Jejunum / Q000648:ultrastructure; D008854:Microscopy, Electron; D051381:Rats
chemical_list: D002843:Chromatin
vernacular_title: Modifications ultrastructurales des nucléoles dans l'epithélium intestinal du rat.