Figure 4. Increased senescence in murine ISCs after heavy ion radiation exposure. (A) Representative IF images showing increased p21 expression in ISCs from heavy ion radiation exposed mice. (B) Increased p19 expression in ISCs from heavy ion radiation exposed mice. (C) ISC sections immunofluorescently stained for Glb1 show increased staining in irradiated samples. (D) Representative IF images showing increased p16 levels in ISCs from heavy ion radiation exposed mice. Scale bar, 5 μm.