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(A) Transmission electron microscopy (80kV) of monodispersed 5 nm gold nanoparticles. (B) Huh7 and HepG2 cells incubated for 24 h with 1 mM Cy5.5-labeled gold nanoparticles, and stained with specific dyes for nuclei (DAPI) and endoplasmic reticulum.
