Viabilities and cytotoxicities of alloCTL at various times after their placement into infusate buffer containing various amounts of IL-2. alloCTL viabilities (a) and their cytolysis of stimulator target lymphoblasts (b) when they were prepared for infusion by placement into HBSS infusate buffer containing different amounts of IL-2 (10,000 IU, gray bar; 30,000 IU, dotted bar; 60,000 IU, striped bar). Values from freshly harvested alloCTL (black bar) are compared to those determined at times between 4 and 20 hr. Representative data from quadruplicate counts (a) or cpm from triplicate wells (b) show average percentages + SEM. *p < 0.01 by two-way ANOVA with Bonferroni post-test.