Norwegian Radiation Protection Authority

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Figure 1:

The surviving fraction of the cells as a function of light dose. Mean and SEM from three independent experiments.

Figure 2:

The sum of the concentrations of 4Z,15Z-bilirubin and the isomers (4Z,15E), (4E,15Z) and Z-lumirubin for various doses of blue light relative to the concentration at zero light dose. Results from one experiment.

Figure 3: Photomicrographs of cells 22 h after the end of treatment.

Figure 3 a: Phase contrast,

Upper left: Untreated cells. Upper right: Bilirubin treated cells in the dark. Lower left: Cells irradiated with 1.75 moles photons m^-2 blue light in the absence of bilirubin. Lower right: Bilirubin and light treated cells (1.75 moles photons m^-2 blue light).

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