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Arginine-rich cell-penetrating peptides (CPP) are widely employed as delivery vehicles for a large variety of macromolecular cargos. As a mechanism-of-action for induction of uptake cross-linking of heparan sulfates and interaction with lipid head groups have been proposed. Here, we employed a multivalent display of the CPP nona-arginine (R9) on a linear dextran scaffold to assess the impact of heparan...
Cell-permeable peptides were evaluated for a quantitatively controlled import of small molecules. The dependence of the import efficiency on the fluorophore, on the position of the fluorophore as well as on the nature of the cargo were addressed. Cellular uptake was quantitated by flow cytometry and fluorescence correlation microscopy (FCM). Fluorophores with different spectral characteristics, covering...
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