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In-situ AFM images of poly(HRP)/DNA polyplexes (N/P = 4) in 0.1 M NaCl (a) taken immediately after the addition of 20 mM DTT and (b) taken 2,270 s after the addition of DTT. The z range is 20 nm. (c) and (d) are sectional height profiles along the broken line in (a) and (b) respectively to show the height reduction of the condensates.
