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Dependence of transfection on duration of exposure to magnetic field. (A) The 293T cells transfected with either DNA/polyMAG or DNA/SPIONs, and subsequently placed on a static magnetic plate either for 5 or 20 min before application of a pulsating magnetic field. (B) HeLa, Cos7 cells and synoviocytes were transfected with DNA/SPIONs similarly. Results are shown as means and SD values from at least three independent experiments.
