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Photomicrographs of rats’ renal tissue showing eNOS expression in glomeruli and renal tubules. a From the control group showing intense cytoplasmic immunoreaction (arrow). b From the GEN group showing faint cytoplasmic immunoreaction (arrow). c From the GEN + NaHS–treated group showing moderate cytoplasmic immunoreaction (arrow). d From the GEN + NaHS + ZnPP–treated group showing weak cytoplasmic immunoreaction. eNOS immunostaining, × 400
