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Cellular uptake of F′-GpYEEI (5 μM) in the presence of dodecanoyl-[R5] and -[R5], dosecanoyl-(R5), and dodecanoyl-[R6] (10 μM) in SK-OV-3 cell line. Phosphopeptide delivery efficiency of dodecanoyl-[R5] were compared with known CPPs (R7, CRRRRRRR; TAT, YGRKKRRQRRR). The mean fluorescence of F′-GpYEEI taken by dodecanoyl-[R5] was set as 100%. Cells with no treatment were used as control.
