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Testing the delivery efficiency of F31 nanoparticles into the Her-2 (+) SKBR-3 cells without aptamer (A.) or with aptamer labeling (B.). SKBR-3 cells were transfected with/without aptamer-labeled F31 nanoparticles for 24h and the delivery of siRNA into the cells was imaged using a fluorescence microscope at 10× magnification.
