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(a) Structure of β3-amino acids which are the monomer for β-peptides considered in this work. (b) The β-peptides from this work can form a variety of secondary structures. Some of the possible helices for β-peptides are shown using the backbone structure. The helix is named by the number of atoms between the hydrogen bond. For example, a 14-helix has 14 atoms between N–H and C=O.
