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. 2016 Mar 9;6:22737. doi: 10.1038/srep22737

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(a) The blue fluorescence from Hoechst 33342 revealed the location of cell nuclei while the green color from FAM indicated the distribution of GNPs-ES. (b) The red color came from endo-/lysosomes stained by LysoTracker Red while the green color from FAM. Inset is the line-scan profiles of fluorescence intensity variation for HeLa cells along the marked line.