title: Structure of the chromosomal material in inactive nuclei of chicken red blood cells.
abstract: Electron microscope sections have been cut of chicken red blood cell nuclei by a novel procedure that produces zones of material below 100 A in thickness. After  fixing and staining, electron dense structures are observed that have dimensions closely correlating with those determined for nucleosomes. These structures appear as wedge-shaped or as circular objects with a diameter of approximately 90-100 A. Five to eight of these objects are arranged in a spiral around  a central core giving rise to a 250-300 A structure which may represent a superbead or a cross section of a solenoidal fibre.
mesh_terms: D000818:Animals; D002645:Chickens / Q000235:genetics*; D002875:Chromosomes / Q000648:ultrastructure*; D004247:DNA; D004912:Erythrocytes / Q000648:ultrastructure; D008854:Microscopy, Electron; D009690:Nucleic Acid Conformation; D009707:Nucleosomes / Q000648:ultrastructure*; D011487:Protein Conformation
chemical_list: D009707:Nucleosomes; D004247:DNA