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Uptake of liposomes as determined by FACS in (A) COS 7 cells overexpressing CD44 receptors and (B) COS 7 cells. DMPG control (red), 0.3 mol % undigested conjugate HA-DiPhPE 2 (blue), 0.3 mol % digested conjugate HAn-DiPhPE 3 (green), and 0.03 mol % digested conjugate HAn-DiPhPE 3 (orange).
