FIG. 6.

Southern blot of Gardella gel analyses of the amounts of wild-type (Wt) and recombinant viruses (Rc) that bound to EBV-negative Akata cells alone or in combination. The starting concentration of each virus stock was equilibrated for virus DNA content. Scanning of the Southern blot at exposures within the linear range indicated that the amount of virion DNA bound in the mixtures of the different viruses was in each case what would have been expected from a simple addition of each virus. The two panels represent duplicate analyses.