Tolerance and immune reconstitution in rD-mPGPtide–treated chimeric mice. On day 60 post-BMT, recipient mice from the haploidentical (A and B) and the MHC class II-disparate (C and D) strain combinations were transplanted with tail skin grafts from the corresponding donor, the host, or an unrelated third party strain (SJL, H2^s). Skin graft survival was monitored in four to five mice receiving transplants per group. The data shown are from one experiment representative of two performed for each strain combination.