Human CD3⁺cells in PB of NOD/SCID/γ_c^null, NOD/SCID-β2m^null, and NOD/SCID mice that underwent transplantation with CB CD34⁺cells. (A) Percentage of human CD3⁺cells among human CD45⁺cells in PB was analyzed sequentially after the transplantation of 4 × 10⁴ CB CD34⁺cells. Results of 2 independent experiments (n = 3 each) are shown. Error bars represent SDs. (B) Surface phenotypes of human CD3⁺T cells in thymus, spleen, and BM of NOD/SCID/γ_c^null mice were evaluated 5 months after the transplantation of 2 to 4 × 10⁴ CB CD34⁺cells. Representative data from 5 independent analyses of similar results are shown.