Fig. 5. Comparison of DAPI and 13 for resistance to photobleaching. (a) Confocal luminescence images of fixed A549 cells stained with DAPI and 13 under continuous irradiation at 405 nm with different laser scan times (0, 350, 700 s). Scale bar = 30 μm. (b) The relative mean luminescence intensity of DAPI and 13 collected from region 1 (green, 430 to 480 nm) and 2 (red, 550 to 650 nm).
