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(a) Cationic CD alone with no siRNA (magnification: x 60,000) (b) Cationic CD: PEGylated CD Molar ratio 1∶0 (i.e. no PEG) (magnification: x 250,000) and (c) Cationic CD: PEGylated CD Molar ratio 1∶1 (magnification: x 60,000). (Negative staining with 2% uranyl acetate).
