Figure 5a:

Flow cytometry data show ⁸⁹Zr-oxine–labeled and nonlabeled CTLs were activated by TCR stimulation equally. (a) ⁸⁹Zr-oxine–labeled and nonlabeled CTLs expressed CD44, CD69, and CD25 at similar levels at the resting state and upregulated these markers after TCR stimulation (representative data of three experiments). (b) ⁸⁹Zr-oxine–labeled cells were capable of producing interferon-γ (FN-γ) and interleukin-2 (IL-2) at TCR activation (representative data of three experiments). Red line indicate TCR-stimulated cells. Blue line indicates unstimulated cells.