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A: Gel retardation assay of MPG peptide complexed with pEGFP-E7 at different N/P ratios; Lane 1: naked plasmid DNA (pEGFP-E7), Lane 2: N/P = 2:1, Lane 3: N/P = 5:1, Lane 4: N/P = 10:1, Lane 5: N/P = 15:1, Lane 6: N/P = 20:1, Lane 7: N/P = 25:1 and lane 8: N/P = 30:1. B: The SEM micrograph of the spherical nanoparticles formed at N/P = 15:1 at 20,000× magnification
