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Most normal tissues showed weak to moderate cytoplasmic staining with a granular pattern. Gastrointestinal tract, islets of Langerhans, cells in glomeruli and skeletal myocytes displayed strong positivity. Respiratory epithelium of nasopharynx showed strong cytoplasmic and membranous positivity. Pneumocytes, cells in seminiferous ducts, glial cells, smooth muscle and non-germinal center cells were negative.