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Acute erythroleukemia cells (KG-1) were transfected with 6-carboxyfluorescein-conjugated miRNA mimic oligonucleotides and then evaluation of transfection efficiency was assessed by fluorescent microscope. Phase contrast (a) and fluorescent (b) images of the same strand of KG-1 cells show that the majority of the cells were transfected. Scale bars 50 μm
