title: Macronuclear changes in Tetrahymena pyriformis GL during the cell cycle and in response to alterations in environmental conditions.
mesh_terms: D002467:Cell Nucleus / Q000254:growth & development*; D003470:Culture Media; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D013768:Tetrahymena / Q000166:cytology*
chemical_list: D003470:Culture Media