Figure 8: A plot of all stem-like cells biomarkers tested in this study, represented as mean percentage of positive cells for CCSP, Surfactant B, CD24, CD44v6, and CD73 in the upper and lower lung lobes of the control (0 Gy), 12 Gy and 16 Gy irradiated rats at 24 weeks (16 weeks post irradiation) and 20 Gy irradiated rats at 12 weeks (4 weeks post irradiation). CCSP: Clara cell secretory protein for Clara cells, Surf B: surfactant B for type II pneumocytes. The percentage of positive cells in the upper lobe was compared to the percentage of the positive cells in the lower lobe for the same marker. In addition, the percentage of positive cells in the upper lobes were compared and the percentage of the positive cells in the lower lobes were compared, among all groups per marker. Significance; *p<0.05, **p<0.01 and *** p<0.001.