4IIL:
reference: Evidence for an ABC-Type Riboflavin Transporter System in Pathogenic Spirochetes., Deka RK, Brautigam CA, Biddy BA, Liu WZ, Norgard MV, MBio. 2013 Feb 12;4(1). pii: e00615-12. doi: 10.1128/mBio.00615-12. PMID: 23404400

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