Microsatellite marker studies of donor and recipient cells before transplantation and recipient cells after marrow transplantation in 3 dogs given 450 cGy TLI, marrow grafts from DLA-identical littermates on day 0, and postgrafting MMF/CSP for 4 and 14.3 weeks, respectively. CD4, CD4⁺ T cells; CD8, CD8⁺ T cells.