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Fig. 4. Attenuation of illumination intensity increased the time to global
depolarisation. (A,B) The rate of mitochondrial depolarisation was
systematically slowed by attenuation of the illumination intensity by neutral
density filters suggesting that ROS formation by fluorophore illumination was
sensitising mPTP formation (P<0001, Kruskal-Wallis non-parametric
ANOVA test, n=46, 27 and 38 cells imaged using 1%, 3.5% and 5%
transmission filters, respectively).