Histology and pathology examination on tissues from bone marrow recipient mice. A, top, left to right, liver samples from Fas, mice that received 50 μg Fas agonist antibody via i.v. injection. The samples were harvested and processed for pathology study 5 hours after the injection; (−) control, mice that received donor bone marrow that was not infected by retrovirus; pMIG, pMIG-transduced mice; pMIG/mTRAIL, pMIG/mTRAIL-transduced mice. Top, H&E staining; bottom, TUNEL staining. Liver hemorrhage can be seen in H&E staining of the Fas sample. B, spleen samples labeled in the same order as in Fig. 3A. C, kidney samples labeled in the same order as in Fig. 3A.