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Concentration kinetics of targeted polyplexes in the blood-stream (◆), tumor (▲) and normal subcutaneous tissue (■) defined as QD voxel volume per mm3 of tissue that was determined using confocal intravital microscopy. Polyplexes, containing 80 μg of QD605-labeled plasmid DNA were injected intravenously. Values are means ± SD.
