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Effect of poliovirus 3A expression in target cells on lysis by three different CTL lines. Target cells were infected with rVV-E2/NS3 and incubated for 4 h with CTL T4 (A), T73 (B), or T84 (C) at CTL/target-cell ratios of 20:1. Specific lysis was determined as in Fig. 1. Data are presented as the mean of triplicate samples, and the standard deviations are indicated. wt-VV, wild-type vaccinia.
