Figure 7
α 5 expression was significantly reduced in pulmonary epithelium from E18.5 TTF-1 null mice compared to age-matched with type controls. A. α5 immunostaining in TTF-null mouse lung revealed almost complete ablation of α5 expression in pulmonary epithelium (arrow). B. Staining for α5 demonstrated marked expression in proximal and distal pulmonary epithelium (arrows). All images are at 40× original magnification.