A Looplike Secondary Structure Uncovered in a Family of Peptoid Hexamers.
This study reports for the first time that peptoid hexamers can adopt a unique looplike structure with a cis-cis-trans-cis-cis-cis arrangement of the backbone amides, and reveals a distinct circular dichroism (CD) fingerprint for loop-shaped peptoids containing chiral aromatic Nspe monomers.