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Relative fluorescence intensity of fluorescein-labeled small interfering RNA (siRNA) in various siRNA/novel redox-responsive hyperbranched poly(amido amine) (named PCD)/hyaluronic acid ternary complexes (siRNA/polycation/hyaluronic acid charge ratio of 1/20/16) prepared by different mixing orders.
Note: *P < 0.01, significant difference between the two groups.
Abbreviation: DTT, dithiothreitol.
