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Bright field (Left) and fluorescent (Right) microscopy of cell cultures treated with Rh-PE-liposomes (37°C; ×400): BT20 and LIP-PEG(2000) (A), H9C2 and LIP-PEG(5000)/pNP-PEG(3000)-TAT (B), BT20 and LIP-PEG(5000)/pNP-PEG(3000)-TAT (C), H9C2 and LIP-PEG(2000)/pNP-PEG(3000)-TAT (D), and BT20 and LIP-PEG(2000)/pNP-PEG(3000)-TAT (E).
