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IL-2 induces Jurkat T-cell activation. (a) Morphological analysis was performed by cytospin preparations of T cells and Wright-Giemsa stain. (b) Jurkat T cells were exposed to different concentrations of IL-2 (50 U/mL or 250 U/mL) for 48 h or 72 h. CD25 expression was measured by flow cytometry. Mean ± SE (n = 3). *P < 0.05.
