2KCG:
reference: Despite a conserved cystine knot motif, different cyclotides have different membrane binding modes., Wang CK, Colgrave ML, Ireland DC, Kaas Q, Craik DJ, Biophys J. 2009 Sep 2;97(5):1471-81. PMID: 19720036

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