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(a) Two i position homologues of peptide 4, Cys(Ph)-containing 5 and Leu-containing 6. (b) The Ala-containing peptide 31 is not quite homologous to the series presented in Figure 15 due to its i+3 Phe residue. (c) An overlay shows the structural similarity between type II′ β-hairpins 25, 6, and 31.
