Figure 4. Donor-derived cells in tolerant mice are predominantly B lymphocytes.

The percentage of cells expressing BALB/c MHC-class I (H-2K^d) in spleen and BM from recipient mice, expressed as mean ± SEM, was determined at the end of all experiments (180 and 225 days post BM transplantation for mice receiving 200 versus 300 μl of liposomal clodronate, respectively). The code for the number of BM cells and the dose of liposomal clodronate for each treatment group is in the box at the top of the figure. Results are summarized from two independent experiments with a total of 4–10 mice in each group (specified in parentheses in the symbol code box).