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The structure-activity relationship between Zn2+-chelated alkylated poly(1-vinylimidazole) (PVIm) and gene transfection has been demonstrated. From a chemical structure perspective, ethylated PVIm (PVIm-Et) chelated the most Zn2+ ions compared to methylated PVIm (PVIm-Me) and butylated PVIm (PVIm-Bu). The resulting Zn2+-chelated PVIm-Et formed more stable complexes with plasmid DNA complex than non-chelated...
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