Figure 7

Lymphoid aggregates in accepted lung allografts. Immunostaining (original magnification, ×100) for CD3, B220, peripheral lymph node addressin (PNAd), and CCL21 for B6 grafts 30 days after transplantation into immunosuppressed CBA host (a–e) or B6 lung grafts, initially transplanted into immunosuppressed CBA host for 72 h and then retransplanted into untreated CBA mouse 30 days after retransplantation (f–j).