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On page 4261, A. V. Melechko, Y. G. Yingling, and co‐workers show that weakly charged cationic nanoparticles cause structural changes including local denaturing and compaction to DNA under mild conditions. The foreground of the cover image shows molecular dynamics simulations of the collective action of weakly charged cationic nanoparticles, which results in DNA strand separation. In the background...
Weakly charged cationic nanoparticles cause structural changes including local denaturing and compaction to DNA under mild conditions. The charged ligands bind to the phosphate backbone of DNA and the uncharged ligands penetrate the helix and disrupt base pairing. Mobility shifts in electrophoresis, molecular dynamics, and UV‐vis spectrophotometry give clues to the details of the interactions.
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