Abstract

Cell killing by Frog Virus 3 was assayed after infection of chinese hamster ovary cells under non permissive conditions for virus multiplication. The kinetics of the loss in the efficiency of colony formation as a function of the virus multiplicity indicated that infection of a cell with a single viral particle brought about cell death. About 15 percent of the cells exhibited transient resistance to killing by single viral particles. Treatment of cells with proteins solubilized from Frog Virus 3 also resulted in cell killing with one hit kinetics thus implying that the interaction with a single viral subunit sufficed to entail cell death.

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