5LWC:
reference: Spatial attributes of the four-helix bundle group of bacteriocins - The high-resolution structure of BacSp222 in solution., Nowakowski M, Jaremko L, Wladyka B, Dubin G, Ejchart A, Mak P, Int J Biol Macromol. 2018 Feb;107(Pt B):2715-2724. doi:, 10.1016/j.ijbiomac.2017.10.158. Epub 2017 Oct 31. PMID: 29107139

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