title: Characterization of a temperature-sensitive membrane alteration in chick embryo fibroblasts infected with a temperature-sensitive mutant of Rous sarcoma virus.
abstract: The intramembrane particles of freeze-fractured chick embryo fibroblasts transformed with a temperature-sensitive mutant of Rous sarcoma virus (TS68) are distributed differently at the permissive and non-permissive temperatures if, and only if, the cells are treated with glycerol before fixation. Few aggregates of intramembrane particles are present in glycerol-treated cells grown at the permissive temperature for transformation (36 degrees C), while numerous large aggregates of particles are present at the non-permissive temperature (41 degrees C). Changes in the distribution of particles after cells are shifted from 36 to 41 degrees C are observed after 20 min, while a temperature shift from 41 to 26 degrees C causes changes in glycerol-induced redistributions after 1 h. The changes observed in temperature shifts from 36 to 41 degrees C and from 41 to 36 degrees D do not require protein synthesis or RNA synthesis.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000502:physiology*; D002449:Cell Aggregation / Q000187:drug effects; D002462:Cell Membrane / Q000502:physiology*; D002472:Cell Transformation, Viral; D002478:Cells, Cultured; D002642:Chick Embryo; D005347:Fibroblasts / Q000502:physiology; D005990:Glycerol / Q000494:pharmacology; D007700:Kinetics; D009154:Mutation; D013696:Temperature
chemical_list: D005990:Glycerol