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Survival curves of (A) LLC, J774, CT26 cells after 24 h incubation with 2 μM BF4 and (B) J774 cells after 24 h incubation with 2 μM BF1–BF6, in both cases followed by a wash and illumination with white light. A MTT assay was carried out after 24 h incubation. Values are means of 9 separate wells and bars are SD. Experiments were repeated at least twice.
