title: Preconjugant cell interaction and cell cycle in the ciliate Euplotes crassus. Switching from the vegetative to the sexual stage.
mesh_terms: D002453:Cell Cycle; D002467:Cell Nucleus / Q000378:metabolism / Q000648:ultrastructure; D016798:Ciliophora / Q000166:cytology* / Q000235:genetics; D003227:Conjugation, Genetic; D004247:DNA / Q000096:biosynthesis; D012733:Sex Differentiation
chemical_list: D004247:DNA