Figure 1. Mitochondrial localization of fura-2 in permeabilized myocytes.
Confocal images of intact rat ventricular cardiomyocyte simultaneously loaded with fura-2 and Mitotracker Orange before (A) and after sarcolemmal permeabilization by saponin (B). Top panels (a) are fura-2 signals, middle panels (b) are Mitotracker Orange, showing typical mitochondrial pattern and lower panels (c) show merged images. Fura-2 only colocalizes with mitochondria after permeabilization. Scale bars are equal 10 μm.