title: Helices in the macronucleus of Euplote eurystomus.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure*; D002843:Chromatin / Q000648:ultrastructure; D016798:Ciliophora / Q000648:ultrastructure*
chemical_list: D002843:Chromatin