Percentage of donor T cells in the spleen, mesenteric lymph nodes (MLNs), and peripheral lymph nodes (PLNs) of hosts given 2 × 10⁶ TCD bone marrow and 2.5 × 10⁶ CD4⁺ T cells from WT and gene-deficient donors. Staining was performed on tissues harvested 2 days after donor cell injection, and panels show H-2^b versus TCRαβ. Boxes enclose donor T cells (H-2K^b+ TCRαβ⁺) and percentages enclosed are shown. Representative patterns are from 1 of 3 experiments.