2MFS:
reference: A Cactus-Derived Toxin-Like Cystine Knot Peptide with Selective Antimicrobial Activity., Aboye TL, Stromstedt AA, Gunasekera S, Bruhn JG, El-Seedi H, Rosengren KJ, Goransson U, Chembiochem. 2015 Mar 27. doi: 10.1002/cbic.201402704. PMID: 25821084

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