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Electron micrographs of PC3 cells indicating the localization of 15 nm Ct-AuNPs (10 μg/mL) near the perinuclear region. (A) AuNPs are located inside an autophagosome (double arrows). (B) AuNPs are located inside a vesicle (single arrow). Scale bars: 500 nm. N: nucleus, a: autophagosome, ICC: intracytoplasmic canaliculus. The box with dotted line in the insets indicates the area of the cell depicted in the main figure at higher magnification.
