Figure 4. Fluorescence of photosensitizers in MKN45 cells under various irradiations of LED light.

MKN45 cells were incubated with TS, O-chlorin, or 5-ALA, then fluorescence intensities were measured using a microplate reader. Light was irradiated under condition of 405 nm and 420 nm excitation, and 635 nm and 650 nm emission. Data are means ± SE of eight independent experiments.