2M7D:
reference: Circular Permutation of the Trp-cage: Fold Rescue upon Addition of a Hydrophobic Staple., Byrne A, Kier BL, Williams DV, Scian M, Andersen NH, RSC Adv. 2013 Nov 21;2013(43). doi: 10.1039/C3RA43674H. PMID: 24376912

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