title: Demonstration of a cell-free factor involved in cell interactions during mating in Tetrahymena.
mesh_terms: D000818:Animals; D002448:Cell Adhesion; D002449:Cell Aggregation; D005508:Food Deprivation; D012098:Reproduction; D013499:Surface Properties; D013768:Tetrahymena / Q000166:cytology / Q000502:physiology*