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Effect of Ptpp-PDT on Bcl-xL and Bax in NOZ cells. Localization of (A) Bcl-xL and (B) Bax determined immunohistochemically at different time points (0–24 hr) after Ptpp-PDT. Quantitative analysis of (C) Bcl-xL-positive and (D) Bax-positive cells. *P < 0.05, **P < 0.01 vs. 0 hr. Data are shown as the mean ± SD of three independent experiments. Bar = 10 μm.
