Fig. 5. Concentration dependent Light-stimulated cytotoxicity.

Cells were treated with EDANS-Dox at various concentrations in the dark (open squares) or with UV light for 20 minutes (black diamonds). After 2 h, the cells were washed with fresh media and allowed to grow for 72 h. The fraction of surviving cells relative to no drug controls was evaluated using the absorbance of the formazan product of MTT reduction. Error bars denote one standard deviation from the mean.