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Top: Synthesis of CoA-linked peptide acyl hydrazide fragment. Bottom: Semi-synthesis of CoA-αSFL by native chemical ligation. Ligation at residues 10/11 (n = 10, m = 11) is described in detail in the main text, and compound numbers correspond to those fragments. Ligation at residues 18/19 (n = 18, m = 19) is described in the SI.
