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Profile of the ligation reaction between peptides 4 and 11 to generate the functional cell-permeable peptide 15. Left panel shows RP-HPLC of the ligation reaction after 8 h. Right panel shows RP-HPLC of the purified product 15. The inset is MALDI-MS of the product showing a mass of 3397.9 (calc 3398.0).
