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Flow cytometric analysis of apoptosis induction by 4.75 ± 1.23 μg/mL SG-stabilized AuNPs in HeLa cells after staining with FITC-conjugated annexin-V and PI. (a1–c1) Untreated (control) HeLa cells at 12, 24 and 48 h incubation respectively; (a2–c2) Effects of 12, 24 and 48 h SG-stabilized AuNPs treatment, respectively.
