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Amino acid sequences of each single chain peptide used in this work: (A) 4A, (B) 4B, (C) 5A1, (D) 5A2 and (E) 5B. Heptad repeat patterns are shown below the corresponding sequence. Mutations and side chain modifications are highlighted in red. Cartoon representations of three expected heterodimeric coiled coils: (F) 4A/4B dimer, (G) 5A1/5B dimer and (H) 5A2/5B dimer. Terminal and side chain modifications are highlighted by the corresponding chemical structures.
