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Histochemical images of xenografted 786-O tumor tissue sections at day 3 after laser irradiation. For cleaved caspase-3 (c-cas-3) and TUNEL immunofluorescence staining, nuclei were stained blue (DAPI staining) and apoptotic cells were stained green (c-cas-3 staining) or red (TUNEL staining). Scale bars represent 100 μm.
