title: Constancy of a 200 å fiber in human chromatin and chromosomes.
mesh_terms: D002843:Chromatin / Q000032:analysis*; D002875:Chromosomes / Q000032:analysis*; D003078:Colchicine; D006801:Humans; D008214:Lymphocytes / Q000166:cytology; D008854:Microscopy, Electron; D008938:Mitosis; D010783:Photometry
chemical_list: D002843:Chromatin; D003078:Colchicine