Fig. 4

KRT5⁺ and KRT14⁺ basal cell subpopulations in the IPF lung. Sections from IPF human lungs (5 patients) were co-stained for KRT5 (green), KRT14 (red) and counterstained with DAPI (blue). a Two representative pictures, with corresponding high magnification panels, are shown for the conducting airways. b 4 representative pictures, with corresponding high magnification panels, illustrate the distribution patterns (metaplastic, simple and pod-like) of KRT5⁺ and KRT14⁺ basal cell subpopulations in the distal IPF lung. Full bars = 500 μm. Scattered bars = 100 μm