Figure 2.

CD4⁺ T Cells Respond to IL-2 by Up-regulating CD25 Expression 5 Days after Every Cycle. a and b. IL-2 induces more CD25 expression on CD4⁺ T cells. Values are percentage of (a) CD4⁺ or (b) CD8⁺ T cells which express CD25. Representative low-dose recipient shown. Patient received scIL-2 on days 1–5, 65–69 and 121–125