Fig. 3. PDT effect of 19 (A) and 20 (B) in MC28 cells. Cells were incubated with Tat–porphyrin conjugates at various concentrations and were illuminated with a blue lamp for up to 5 min. MTT assay was carried out 48 h after light exposure. Data are presented as mean value ± standard deviation (SD) of three independent experiments.
