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Expression of inducible nitric oxide synthase (iNOS) (indicated by arrows) in normal syncytiotrophoblasts (A), preeclamptic syncytiotrophoblast (B), and intrauterine growth restriction (C) detected with polyclonal rabbit antibodies of the IgG subtype and staining with diaminobenzidine; X25 lens. Expression of iNOS was also detected in extravillous trophoblast cells of normal-term placentas (D), preeclamptic placentas (E), and intrauterine growth-restricted placentas (F); X25 lens.
