A typical profile of split chimerism, exhibited by chimeric mice transplanted with Sca-1⁺Lin⁻cells (2 × 10⁵, H2^b+), (C3H/HeJ × C57BL/6)F1 T cells (H2^k+ + H2^b+, 10 × 10⁶), or both. Peripheral blood chimerism was analyzed 30 days posttransplant by flow cytometry, using antibodies directed against host (H2^k) and donor (H2^b) MHC antigens.