C57BL/6asmase+/+ and C57BL/6asmase−/− recipients were infused with 5 × 106 LP/J TCD-BM as described in “Mice and BMT.” Spleens were harvested 14 days thereafter, and multicolor flow cytometry was performed using fluorescent-labeled antibodies to B220 (B cells), CD4, and CD8. Data are expressed as percentage of total population of each lineage that is donor derived (Ly9.1+) ± SE.