title: Observations on the three-dimensional structure of the nucleolar channel system of the human endometrial glandular cell.
abstract: Nucleolar channel systems from human endometrial glandular cells have been subjected to three-dimensional analysis using a goniometer stage. The results are compatible with a secondary helical conformation of the constituent tubules and this idea has been incorporated into an improved model of the channel system.
mesh_terms: D002466:Cell Nucleolus / Q000648:ultrastructure*; D004717:Endometrium / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D008961:Models, Structural