In HaCaT, A2780 cells and A2780CIS cells. Cells were irradiated with 5 J cm−2 filtered UVA as described in the methods section. Data are the mean ± SE of 4/6 monolayers from 2/3 independent experiments. The viability of cells irradiated with 5 J cm−2 UVA compared to those kept in the dark was > 90% in all experiments. Figure subdivided by complexes a) 7c, 8c, 9c; b) 7t, 8t, 9t, 10t, 11t; c) 1c 4c 5c 6c; d) 1t, 2t, 3t.