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MCF-7 luciferase cells respond in a dose-dependent manner to three positive photosensitive compounds. Compounds tested were Hyp, methylene blue, and ZnPc. The luciferase activity in MCF-7 luciferase cells was measured and expressed as relative luciferase activity versus control (a, d, and g). Cell viability was evaluated using the CellTiter-Glo Assay kit (b, e, and h). Oxidative damage was measured by ROS assay (c, f, and i). Data represent mean ± SD of three individual experiments
