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Cytochemical staining of human glioblastoma cells U-87 MG using the closo-dodecaborate conjugates of 2’-F-RNA aptamer B12-GL44 or scrambled control B12-fscr. DAPI-stained nuclei, blue signal, Sulfo-Cy5-labeled 2’-F-RNA conjugates, red signal, CellTracker ™ green CMFDA, green signal.
