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Immunolocalization of iNOS in kidney of control (A, B) and cyclosporin A-treated (C, D) rat. Brown color indicates immunopositivity (×200). (A, C) cortex; (B, D): medulla. Gl = glomerula; Pt = proximal tubules; Dt = distal tubules; Vr = vasa recta; Hl = Henle loops.
