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Cells exposed to G5 PAMAM acetylated to different levels. G5 PAMAM with 80% of the primary amines acetylated did not induce membrane permeability. A) The first dotted line at 65 s indicates the release of the G5 PAMAM resulting in exposure of cells to G5 PAMAM. The second dotted line denotes the end of G5 PAMAM exposure.
