Fig. 3

Effects of PBMF on apoptosis induction of tumor cells in SGC-7901 xenograft tumor model. a TUNEL staining of xenograft tumor tissues was performed and observed under fluorescent microscope (200×). Nuclei with green fluorescence were considered as TUNEL positive cells, while nuclei with blue fluorescence were consider as total cancer cells. b Number of TUNEL positive cells was calculated at high magnification in five random fields under a fluorescent microscope. Results were represented as mean ± SD. ^*p < 0.05 vs. model control; ^**p < 0.01 vs. model control. (Each part of the multi-panel Fig. 3 see Additional file 3)