FIGURE 2.

Cat-S expression in kidney biopsies from renal transplant patients with acute T cell–mediated rejection by immunostaining. (A) Cat-S and CD68 staining in health human kidney tissue. Consecutive kidney slides were stained for CD68 (left, in red) and Cat-S (right, in brown). CD68-positive cells and Cat-S-positive cells were marked by black arrows. Magnification 200×. (B) Cat-S and CD68 staining in rejecting human kidney allografts. CD68 single staining (left), Cat-S single staining (middle), and Cat-S/CD68 double staining (right) was performed on tissues from patients undergoing kidney rejection. Cat-S/CD68 double-positive cells were marked by black arrow.