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NEU3 immunostaining of airway epithelial tissues. Sections (5.0 μm) of human trachea (A), main stem bronchus (B), segmental bronchus (C), and expanded alveoli (D) were processed for NEU3 immunohistochemistry. As a negative control, sections of alveoli were probed with nonimmune rabbit IgG (E). Each section was photographed at ×400 or ×1,000 (insets). Scale bar, 50 μm. Arrows indicate immunostaining for NEU3. Each photograph is representative of 2 independent sections.
