4HJB:
reference: Differential Impact of beta and gamma Residue Preorganization on alpha/beta/gamma-Peptide Helix Stability in Water., Shin YH, Mortenson DE, Satyshur KA, Forest KT, Gellman SH, J Am Chem Soc. 2013 May 23. PMID: 23701135

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).