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. Author manuscript; available in PMC: 2007 Sep 12.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2007 Mar 1;67(3):870–878. doi: 10.1016/j.ijrobp.2006.10.030

Figure 2.

Figure 2

Figure 2

Time course analyses of tumor cell apoptosis and proliferation. (a) Tumor cell apoptosis as evaluated by the TUNEL assay. Apoptotic tumor cells were counted in 7-9 random fields at ×400 magnification, excluding necrotic areas. (b) Tumor cell proliferation as evaluated by BrdU incorporation. Mice were injected intravenously with 250 μg of BrdU and killed 1 hour after injection. The number of proliferating tumor cells was determined in 3-6 random fields at ×200 magnification.