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AFM imaging of pBR332 DNA plasmids treated with curcumin and/or Cu (II). A: Plasmid 0.05 µg plus 0.02 mM Cu (II) for 2 h; B: Plasmid 0.05 µg plus 0.02 mM curcumin for 2 h; C: Plasmid 0.05 µg plus 0.02 mM Cu (II) plus 0.02 mM curcumin for 2 h.
