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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: Curr Opin Chem Biol. 2008 Sep 5;12(6):722–729. doi: 10.1016/j.cbpa.2008.08.009

Figure 4.

Figure 4

Chemical models of β-sheet quaternary structure. (A) Edge-to-edge antiparallel β-sheet dimer present in the tetrameric β-sheet sandwich of 54-membered-ring cyclic β-sheet peptides containing Hao and δOrn units. (B) Parallel β-sheet dimer containing succinic or fumaric diacid linkers and β-strand and β-turn mimics. (C) Antiparallel β-sheet-like dimer of Ach-based cyclic α,γ-peptides. (D) Antiparallel β-sheet dimer stabilized by a disulfide linkage. (E) Antiparallel β-sheet heterodimer stabilized by metal coordination.