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Cytotoxicity of (open square) pDNA-loaded Ca-pectinate (pectin:CaCl2 = 0.2:1); (filled square) pDNA-loaded Mg-pectinate (pectin/MgCl2 = 0.01:1) in Huh7 cells. Each well has 0.2 μg of pDNA and pectin/pDNA (1 = 1:1; 2 = 5:1; 3 = 10:1; 4 = 20:1). Each value represents the mean±SD of six wells
