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Smac/DIABLO, a pro-apoptotic protein released from mitochondrial intermembrane space during apoptosis, promotes caspase activation by IAPs neutralization. The kinetics and molecular mechanism of Smac/DIABLO release from mitochondria has remained obscure. Homeostatic confocal microscopy, for the first time, showed the precise kinetics of Smac/DIABLO release from mitochondria during CPT-induced apoptosis...
Traditional methods of visualization and analysis based on fixed cell populations treated with the drug for a different time give the limited possibility of time-sequence analysis. In time-lapse microscopy where the whole cell is observed regardless to intracellular structure, precise localization of events and differentiation between colocalization and overlapping of the fluorescence is impossible...
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