Reduced graft infiltration with DST and αCD154 treatment. TEa Tg T cells (1 × 10⁶) were adoptively transferred into C57BL/6 RAG^–/– recipients that received transplants of a CB6F₁ skin graft and were treated with or without CB6F₁ DST and/or αCD154 or H-Ig. Another group of mice received a syngeneic C57Bl/6 skin transplant as a negative control. Skin grafts were removed on days 4, 7, and 14, formalin fixed, and processed for H&E staining. Original magnification, × 100.