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Evaluation of biodegradability of PEI‐DA and PEI‐DA‐TAT at the N/P ratio of 10. Naked DNA was used as reference. Lane 1–4: PEI800, PEI25K, PEI‐DA and PEI‐DA‐TAT. Lanes 5 and 6: PEI‐DA treated with 20 mM and 50 mM DTT separately. Lanes 7 and 8: PEI‐DA‐TAT treated with 20 mM and 50 mM DTT separately. Exposure time: 500 ms.
