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. 2005 Jan 7;33(1):27–42. doi: 10.1093/nar/gki142

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© 2005, the authors Nucleic Acids Research, Vol. 33 No. 1 © Oxford University Press 2005; all rights reserved

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Confocal microscope images of the free uptake of fluorescein-labelled CPP conjugates (green) into human fibroblasts (nucleus stained red). Left panels show a range of cells (nucleus stained red). Right panels are the same cells in DIC. Horizontally, (A) conjugate 6 (OMe/LNA oligo B conjugated with the C-terminus of Penetratin), (B) conjugate 12 (OMe/LNA oligo B conjugated with R₉F₂), (C) conjugate 13 (OMe/LNA oligo B conjugated with Transportan) and (D) conjugate 15 (OMe/LNA oligo B conjugated with R₄-Tat).