Figure 2. Representative immunostaining of γ-H2AX in murine tissues. Representative images showing the presence of γ-H2AX foci in spleen, thymus and cerebellum tissues of 7 and 45 days old male mice irradiated with 0 or 1 Gy of X-rays. Green, γ-H2AX; blue, DNA stained with DAPI. Average numbers of foci per cell? standard error are shown in the right bottom corner of the images (100x magnification).