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DNA stability analysis. a) Representative agarose gel showing the integrity of DNA recovered from 20% and 0% GPP-PEI/Total PEI polyplex-containing collagen gels after various preincubation time periods in media (DMEM supplemented with 10% FBS b) Quantification of gel fluorescence observed in GPP-modified samples where the mean +/− standard deviation is for a total of three separately prepared and analyzed samples run within the same gel.
