title: Mutants of the simian virus 40 which differ in cell-transforming activity.
mesh_terms: D002455:Cell Division; D003588:Cytopathogenic Effect, Viral; D009154:Mutation; D009500:Neutralization Tests; D013539:Simian virus 40 / Q000254:growth & development* / Q000302:isolation & purification; D014776:Virus Cultivation