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. Author manuscript; available in PMC: 2013 Mar 26.
Published in final edited form as: Photochem Photobiol Sci. 2011 Mar 15;10(6):1056–1065. doi: 10.1039/c0pp00356e

Fig. 6.

Fig. 6

Clonogenic survival data for RIF cells incubated with Photofrin or G2 during 18 h and irradiated with 630 nm light. Hollow symbols – photosensitizer is absent from the medium during irradiation. Filled symbols – photosensitizer is left in the medium during irradiation. Surviving fractions are calculated as fractions of the colony-forming cells in the treated samples compared to controls that received neither photosensitizer nor light. The data are shown as average ± SE from 3 independent studies. * No surviving cells were found for this condition – the point indicates the lower limit of the assay sensitivity.