4PVH:
reference: Rationally engineered flavin-dependent oxidase reveals steric control of dioxygen reduction., Zafred D, Steiner B, Teufelberger AR, Hromic A, Karplus PA, Schofield CJ, Wallner S, Macheroux P, FEBS J. 2015 Jan 24. doi: 10.1111/febs.13212. PMID: 25619330

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