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VE-Cadherin and CD34 immunohistochemical staining of frozen renal biopsy serial sections (X 400). (a), (b) No acute rejection. (c), (d) Acute rejection grade IA. (e), (f) Acute rejection grade IIA. (a), (c) and (e): VE-Cadherin staining on peritubular endothelial cells (arrows). (b), (d) and (f): CD34 staining on peritubular endothelial cells (arrows).
