Fig. 3. Assessment of apoptotic cell death in thymic cell populations at d 50 in ZA and ChrZD mice by flow cytometry. Apoptotic cell death for individual mice are presented by T cell subset: Pro-T (CD90.2⁺CD4^–CD8^–), Pre-T (CD90.2⁺CD4⁺CD8⁺), CD4 (CD90.2⁺CD4⁺CD8^–), CD8 (CD90.2⁺CD4^–CD8⁺). Each bar is the group mean ± SD. ZA n = 9, ChrZD n = 8. *significantly different from ZA mice, p < 0.05."