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FACS cellular uptake assay of truncated analogs of Tat49–57 (Fl-ahx-RKKRRQRRR): Tat49–56 (Fl-ahx-RKKRRQRR), Tat49–55 (Fl-ahx-RKKRRQR), Tat50–57 (Fl-ahx-KKRRQRRR), and Tat51–57 (Fl-ahx-KRRQRRR). Jurkat cells were incubated with varying concentrations (12.5 μM shown) of peptides for 10 min at 23°C.
