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Immunoperoxidase staining for HO-1 in normal human kidney (A) and in the kidney of a patient with sickle cell disease (B). In A and B, immunoperoxidase studies were undertaken in the absence (left) and presence (right) of HO-1 antibody. B: Positive staining with the HO-1 antibody in renal proximal tubules in the kidney of the patient with sickle cell disease (right). Original magnification, ×400.
