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Photomicrographs of immunoexpression for iNOS in colon sections showing (a) negative control with no positive reaction; (b) positive control group with intense immunopositive reactions of anti iNOS in DSS group; (c) moderate number of immunopositive cells in QT-NPsI group; (d) weak stained cells in few numbers in colon epithelium in QT-NPsII group; (e) no immunoreactive cells in QT-NPsIII group. IHC counterstaining with Mayer’s hematoxylin. Scale bar 100 µm.
