Electron-dense Structures in Mitochondria Induced by Short-term Ethidium Bromide Treatment

FIGURE 4 Section reveals three mitochondrial complexes (arrows) . In one mitochondrion a divalent cation granule (G) can also be seen . X 15,000 . FIGURE 3 Longitudinal section of mitochondrion . The complex appears to be arranged in a helical manner . X 35,000 . FIGURE 4 Cross section of mitochondrion showing complex . X 35,000 . FIGURES 5-8 Sections of mitochondria from cells treated for 8 h with EB (10,ug/ml) . FIGURE 5 Mitochondrial complex (arrow) located in a cristae-free area . Note also the dense ribosomes in the cytoplasm. X 34,000 . FIGURE 6 Condensed mitochondrial complex typically seen in 8-h-treated cultures . Note the disorder of the few cristae present. X 34,500. FIGURE 7 A swollen mitochondrion with complex located in a large cristae-free area . X 50,000 . FIGURE 8 Mitochondrion with prominent cristae contains a complex (arrow) and divalent cation granule (G) . X 54,000.