Flow cytometric analysis of Bcl-2 levels in post-BMT lymphocytes. Relationship with the rate of enhanced spontaneous apoptosis in short-term culture. (A) MFI for intracellular Bcl-2 expression in ex vivo CD4⁺ and CD8⁺ T lymphocytes. Horizontal bars are the arithmetic means of individual data. (B) Inverse correlation between Bcl-2 expression in post-BMT T cells and the rate of spontaneous apoptosis in vitro.