Figure 3From: Evaluation of epithelial mesenchymal transition in patients with chronic obstructive pulmonary diseaseBronchial biopsy specimen from a COPD current smoker stained for S100 compared to S100A4. Black arrows showing cells stained for: (A) S100 (anti-S100 polyclonal antibody; Langerhans cell marker); compared to (B) S100A4 (anti-S100A4 polyclonal antibody; mesenchymal marker). Original magnifications, × 400. Scale bar = 50 μm.Back to article page